Publications of the group 

Reprints are available upon request !

Eibl, E. P. S., Karmacharya, S., Shevchenko, A. V., Walter, T. R. and Hersir, G. P. (2024) Video camera and seismic monitoring of water bulge explosion at Strokkur Geyser, Iceland. Volcanica, 7(1), pp. 229–245. doi: 10.30909/vol.07.01.229245.

Walter, Thomas (2024): Drone based photogrammetry data at the Geysir geothermal field, Iceland. GFZ Data Services.

Valade, S., Coppola, D., Campion, R. et al. Lava dome cycles reveal rise and fall of magma column at Popocatépetl volcano. Nat Commun 14, 3254 (2023).

EU Zorn, M Vassileva, TR Walter, H Darmawan, L Röhler, F Amelung (2023) Interactions of magmatic intrusions with the multiyear flank instability at Anak Krakatau volcano, Indonesia: Insights from InSAR and analogue modeling. Geology 51 (4), 340-344.   Download PDF.

P Makus, P., C. Sens-Schonfelder, L. Illien, T.R. Walter, A. Yates, and F. Tilmann, 2023, Deciphering the Whisper of Volcanoes: Monitoring Velocity Changes at Kamchatka's Klyuchevskoy Group With Fluctuating Noise Fields. Journal of Geophysical Research-Solid Earth. 128(4). e2022JB025738. DOI: 10.1029/2022JB025738.  Download PDF.

Walter, T. R., Zorn, E. U., González, P. J., Sansosti, E., Muñoz, V., Shevchenko, A. V., Plank, S. M., Reale, D. and Richter, N. (2023) “Late complex tensile fracturing interacts with topography at Cumbre Vieja, La Palma”, Volcanica, 6(1), pp. 1–17. doi: 10.30909/vol.06.01.0117. Download PDF.

Lun, A., Walter, T., Aguilera, F., Layana, S., Mania, R., Kujawa, C., Zimmer, M., Inostroza, M. (2023): Crater morphology, nested ring structures, and temperature anomalies studied by unoccupied aircraft system data at Lascar volcano, northern Chile. - Journal of Volcanology and Geothermal Research, 439, 107840.

Plank, S., A.V. Shevchenko, P. d'Angelo, V. Gstaiger, P.J. Gonzalez, S. Cesca, S. Martinis, and T.R. Walter, 2023, Combining thermal, tri-stereo optical and bi-static InSAR satellite imagery for lava volume estimates: the 2021 Cumbre Vieja eruption, La Palma. Nature Scientific Reports. 13(1). DOI: 10.1038/S41598-023-29061-6.

Marzban, P., S. Bredemeyer, T.R. Walter, F. Kaestner, D. Mueller, and S. Chabrillat, 2023, Hydrothermally altered deposits of 2014 Askja landslide, Iceland, identified by remote sensing imaging. Frontiers in Earth Science. 11. DOI: 10.3389/Feart.2023.1083043.

Allahbakhshi, M.; Shevchenko, A.V.; Belousov, A.B.; Belousova, M.G.; Kämpf, H.; Walter, T.R. Geothermal Explosion at the 2014 Landslide-Covered Area of the Geyser Valley, Kamchatka, Russian Far East. GeoHazards 2023, 4, 60-76.

Kereszturi, G., M. Heap, L.N. Schaefer, H. Darmawan, F.M. Deegan, B. Kennedy, J.C. Komorowski, S. Mead, M. Rosas-Carbajal, A. Ryan, V.R. Troll, M. Villeneuve, and T.R. Walter, 2023, Porosity, strength, and alteration - Towards a new volcano stability assessment tool using VNIR-SWIR reflectance spectroscopy. Earth and Planetary Science Letters. 602. DOI: 10.1016/J.Epsl.2022.117929.

Holohan, E.P., S. Poppe, A. Delcamp, P.K. Byrne, T.R. Walter, B.V. de Vries, and M. Kervyn, 2023, Transition from volcano-sagging to volcano-spreading. Earth and Planetary Science Letters. 604. DOI: 10.1016/J.Epsl.2023.118012.

Gertisser, R., Troll, V., Walter, T. R., I Gusti Made Agung Nandaka, Ratdomopurbo, A. (Eds.)(2023): Merapi Volcano: Geology, Eruptive Activity, and Monitoring of a High-Risk Volcano, (Active Volcanoes of the World), Cham : Springer International Publishing, 572 p.

Darmawan, H., Putra, R., Budi-Santoso, A., Humaida, H., Walter, T. (2023): Morphology and Instability of the Merapi Lava Dome Monitored by Unoccupied Aircraft Systems. - In: Gertisser, R., Troll, V. R., Walter, T., Nandaka, I. G. M. A., Ratdomopurbo, A. (Eds.), Merapi Volcano: Geology, Eruptive Activity, and Monitoring of a High-Risk Volcano, (Active Volcanoes of the World), Cham: Springer International Publishing, 457-472.

Nandaka, I. G. M. A., Gertisser, R., Walter, T., Troll, V. R., Ratdomopurbo, A. (2023): Merapi: Evolving Knowledge and Future Challenges. - In: Gertisser, R., Troll, V. R., Walter, T., Nandaka, I. G. M. A., Ratdomopurbo, A. (Eds.), Merapi Volcano: Geology, Eruptive Activity, and Monitoring of a High-Risk Volcano, (Active Volcanoes of the World ), Cham : Springer International Publishing, 553-572.

Walter, T. R. (2023): Radar Sensing of Merapi Volcano. - In: Gertisser, R., Troll, V. R., Walter, T., Nandaka, I. G. M. A., Ratdomopurbo, A. (Eds.), Merapi Volcano: Geology, Eruptive Activity, and Monitoring of a High-Risk Volcano, (Active Volcanoes of the World), Cham : Springer International Publishing, 437-456.

Zorn, E.U., A. Orynbaikyzy, S. Plank, A. Babeyko, H. Darmawan, I.F. Robbany, and T.R. Walter, 2022, Identification and ranking of subaerial volcanic tsunami hazard sources in Southeast Asia. Natural Hazards and Earth System Sciences. 22(9): p. 3083-3104. DOI: 10.5194/nhess-22-3083-2022.

Walter, T.R., E.U. Zorn, C.E. Harnett, A.V. Shevchenko, A. Belousov, M. Belousova, and M.S. Vassileva, 2022, Influence of conduit and topography complexity on spine extrusion at Shiveluch volcano, Kamchatka. Nature Communications Earth & Environment. 3(1). DOI:  10.1038/s43247-022-00491-w.

Munoz, V., T.R. Walter, E.U. Zorn, A.V. Shevchenko, P.J. Gonzalez, D. Reale, and E. Sansosti, 2022, Satellite Radar and Camera Time Series Reveal Transition from Aligned to Distributed Crater Arrangement during the 2021 Eruption of Cumbre Vieja, La Palma (Spain). Remote Sensing. 14(23). DOI: 10.3390/Rs14236168.

Mueller, D., T.R. Walter, M. Zimmer, and G. Gonzalez, 2022, Distribution, structural and hydrological control of the hot springs and geysers of El Tatio, Chile, revealed by optical and thermal infrared drone surveying. Journal of Volcanology and Geothermal Research. 432. DOI: 10.1016/j.jvolgeores.2022.107696.

Harnett, C.E., M.J. Heap, V.R. Troll, F.M. Deegan, and T.R. Walter, 2022, Large-scale lava dome fracturing as a result of concealed weakened zones. Geology. 50(12): p. 1346-1350. DOI: 10.1130/G50396.1.

Gudmundsson, A., K. Drymoni, J. Browning, V. Acocella, F. Amelung, F.L. Bonali, A. Elshaafi, I. Galindo, N. Geshi, A. Geyer, M.J. Heap, O. Karaoglu, S. Kusumoto, J. Marti, V. Pinel, A. Tibaldi, T. Thordarson, and T.R. Walter, 2022, Volcanotectonics: the tectonics and physics of volcanoes and their eruption mechanics. Bulletin of Volcanology. 84(8). DOI: 10.1007/S00445-022-01582-4.

Flovenz, O.G., R.J. Wang, G.P. Hersir, T. Dahm, S. Hainzl, M. Vassileva, V. Drouin, S. Heimann, M.P. Isken, E.A. Gudnason, K. Agustsson, T. Agustsdottir, J. Horalek, M. Motagh, T.R. Walter, E. Rivalta, P. Jousset, C.M. Krawczyk, and C. Milkereit, 2022, Cyclical geothermal unrest as a precursor to Iceland's 2021 Fagradalsfjall eruption. Nature Geoscience. 15(5): 397. DOI: 10.1038/s41561-022-00930-5.

Darmawan, H., V.R. Troll, T.R. Walter, F.M. Deegan, H. Geiger, M.J. Heap, N. Seraphine, C. Harris, H. Humaida, and D. Muller, 2022, Hidden mechanical weaknesses within lava domes provided by buried high-porosity hydrothermal alteration zones. Nature Scientific Reports. 12(1). DOI: 10.1038/S41598-022-06765-9.

Bindeman, I.N., F.M. Deegan, V.R. Troll, T. Thordarson, A. Hoskuldsson, W.M. Moreland, E.U. Zorn, A.V. Shevchenko, and T.R. Walter, 2022, Diverse mantle components with invariant oxygen isotopes in the 2021 Fagradalsfjall eruption, Iceland. Nature Communications. 13(1). DOI: 10.1038/S41467-022-31348-7.

Lauterjung, J., Babeyko, A. Y., Cotton, F., Pilz, M., Spahn, H., SHPRITS, Y., Tilmann, F., Walter, T. (2022): Early-warning systems in geophysics, DGG100 - Geophysik im Wandel, 1-11.

Hort, M., Eibl, E., Walter, T. R. (2022): Volcanoes - Their Monitoring and Use as Geophysical Laboratories, (in german), DGG100 - Geophysik im Wandel, 1-11.

Vassileva, M., D. Al-Halbouni, M. Motagh, T.R. Walter, T. Dahm, and H.U. Wetzel, 2021, A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceio, Brazil. Scientific Reports. 11(1). DOI: 10.1038/S41598-021-87033-0.

Shevchenko, A.V., V.N. Dvigalo, E.U. Zorn, M.S. Vassileva, F. Massimetti, T.R. Walter, I.Y. Svirid, S.A. Chirkov, A.Y. Ozerov, V.A. Tsvetkov, and I.A. Borisov, 2021, Constructive and Destructive Processes During the 2018-2019 Eruption Episode at Shiveluch Volcano, Kamchatka, Studied From Satellite and Aerial Data. Frontiers in Earth Science. 9. DOI: 10.3389/Feart.2021.680051.

Seropian, G., B.M. Kennedy, T.R. Walter, M. Ichihara, and A.D. Jolly, 2021, A review framework of how earthquakes trigger volcanic eruptions. Nature Communications. 12(1). DOI: 10.1038/S41467-021-21166-8.

Mueller, D., S. Bredemeyer, E. Zorn, E. De Paolo, and T.R. Walter, 2021, Surveying fumarole sites and hydrothermal alteration by unoccupied aircraft systems (UAS) at the La Fossa cone, Vulcano Island (Italy). Journal of Volcanology and Geothermal Research. 413. DOI: 10.1016/j.jvolgeores.2021.107208.

Mania, R., S. Cesca, T.R. Walter, I. Koulakov, and S.L. Senyukov, 2021, Inflating Shallow Plumbing System of Bezymianny Volcano, Kamchatka, Studied by InSAR and Seismicity Data Prior to the 20 December 2017 Eruption. Frontiers in Earth Science. 9. DOI: 10.3389/Feart.2021.765668.

Koulakov, I., P. Plechov, R. Mania, T.R. Walter, S.Z. Smirnov, I. Abkadyrov, A. Jakovlev, V. Davydova, S. Senyukov, N. Bushenkova, A. Novgorodova, T. Stupina, and S.Y. Droznina, 2021, Anatomy of the Bezymianny volcano merely before an explosive eruption on 20.12.2017. Scientific Reports. 11(1). DOI: 10.1038/S41598-021-81498-9.

Ghosh, B., M. Motagh, M.H. Haghighi, M.S. Vassileva, T.R. Walter, and S. Maghsudi, 2021, Automatic Detection of Volcanic Unrest Using Blind Source Separation With a Minimum Spanning Tree Based Stability Analysis. Ieee Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 14: p. 7771-7787. DOI: 10.1109/Jstars.2021.3097895.

Eibl, E.P.S., D. Mueller, T.R. Walter, M. Allahbakhshi, P. Jousset, G.P. Hersir, and T. Dahm, 2021, Eruptive Cycle and Bubble Trap of Strokkur Geyser, Iceland. Journal of Geophysical Research-Solid Earth. 126(4). DOI: 10.1029/2020JB020769.

Coppola, D., L. Marco, F. Massimetti, S. Hainzl, A.V. Shevchenko, R. Mania, M. Nikolai, Shapiro, and T.R. Walter, 2021, Thermal remote sensing reveals communication between volcanoes of the Klyuchevskoy Volcanic Group. Scientific Reports. 11(1). DOI: 10.1038/S41598-021-92542-Z.

Belousov, A., M. Belousova, A. Auer, T.R. Walter, and T. Kotenko, 2021, Mechanism of the historical and the ongoing Vulcanian eruptions of Ebeko volcano, Northern Kuriles. Bulletin of Volcanology. 83(1). DOI: 10.1007/s00445-020-01426-z.

Zorn, E.U., T.R. Walter, J.B. Johnson, and R. Mania, 2020, UAS-based tracking of the Santiaguito Lava Dome, Guatemala. Scientific Reports. 10(1). DOI: 10.1038/S41598-020-65386-2.

Tanner, D. C., Buness, H., Igel, J., Günther, T., Gabriel, G., Skiba, P., Plenefisch, T., Gestermann, N., Walter, T. (2020): Fault detection. - In: Tanner, D., Brandes, C. (Eds.), Understanding Faults: Detecting, Dating, and Modeling, Amsterdam : Elsevier, 81-146.

Walter, T. R. (2020): Warum brauchen wir Vulkanforschung in Deutschland?: Interview. - In: Jorzik, O., Kandarr, J., Klinghammer, P., Spreen, D. (Eds.), Vulkanismus und Gesellschaft. Zwischen Risiko, Vorsorge und Faszination, Potsdam : Deutsches GeoForschungsZentrum GFZ, 170-174.

Walter, T. R. (2020): Vulkanausbruch auf Island: was lässt sich für die Risikovorsorge lernen?; Interview. - In: Jorzik, O., Kandarr, J., Klinghammer, P., Spreen, D. (Eds.), Vulkanismus und Gesellschaft. Zwischen Risiko, Vorsorge und Faszination, Potsdam : Deutsches GeoForschungsZentrum GFZ, 62-66.

Zorn, E.U., T.R. Walter, M.J. Heap, and U. Kueppers, 2020, Insights into lava dome and spine extrusion using analogue sandbox experiments. Earth and Planetary Science Letters. 551. DOI: 10.1016/J.Epsl.2020.116571.

Walter, T.R., P. Jousset, M. Allahbakhshi, T. Witt, M.T. Gudmundsson, and G.P. Hersir, 2020, Underwater and drone based photogrammetry reveals structural control at Geysir geothermal field in Iceland. Journal of Volcanology and Geothermal Research. 391. DOI: 10.1016/J.Jvolgeores.2018.01.010.

Walter, T.R., A. Belousov, M. Belousova, T. Kotenko, and A. Auer, 2020, The 2019 Eruption Dynamics and Morphology at Ebeko Volcano Monitored by Unoccupied Aircraft Systems (UAS) and Field Stations. Remote Sensing. 12(12). DOI: 10.3390/Rs12121961.

Vassileva, M.S., M. Motagh, T.R. Walter, H.U. Wetzel, and S.L. Senyukov, 2020, The 29 March 2017 Yuzhno-Ozernovskoe Kamchatka Earthquake: Fault Activity in An Extension of the East Kamchatka Fault Zone as Constrained by InSAR Observations. Bulletin of the Seismological Society of America. 110(3): p. 1101-1114. DOI: 10.1785/0120190174.

James, M., Carr, B., D'Arcy, F., Diefenbach, A., Dietterich, H., Fornaciai, A., Lev, E., Liu, E., Pieri, D., Rodgers, M., Smets, B., Terada, A., von Aulock, F., Walter, T., Wood, K., Zorn, E. (2020): Volcanological applications of unoccupied aircraft systems (UAS): Developments, strategies, and future challenges. - Volcanica, 3, 1, 67-114.

Shevchenko, A.V., V.N. Dvigalo, T.R. Walter, R. Mania, F. Maccaferri, I.Y. Svirid, A.B. Belousov, and M.G. Belousova, 2020, The rebirth and evolution of Bezymianny volcano, Kamchatka after the 1956 sector collapse. Nature Communications Earth & Environment. 1(1). DOI: 10.1038/S43247-020-00014-5.

Gaete, A., T.R. Walter, S. Bredemeyer, M. Zimmer, C. Kujawa, L.F. Marin, J. San Martin, and C.B. Parra, 2020, Processes culminating in the 2015 phreatic explosion at Lascar volcano, Chile, evidenced by multiparametric data. Natural Hazards and Earth System Sciences. 20(2): p. 377-397.

Föhl, K., Dahm, T., Düren, M., Goldenbaum, F., Grzonka, D., Ritman, J., Walter, T. R. (2020): Muon radiography employing the DIRC principle for density change measurements under volcanoes and fluid reservoirs. - Journal of Instrumentation, 15, C07030.

Eibl, E.P.S., S. Hainzl, N.I.K. Vesely, T.R. Walter, P. Jousset, G.P. Hersir, and T. Dahm, 2020, Eruption Interval Monitoring at Strokkur Geyser, Iceland. Geophysical Research Letters. 47(1). DOI: 10.1029/2019GL085266.

Zorn, E.U., N. Le Corvec, N.R. Varley, J.T. Salzer, T.R. Walter, C. Navarro-Ochoa, D.M. Vargas-Bracamontes, S.T. Thiele, and R.A. Mendoza, 2019, Load Stress Controls on Directional Lava Dome Growth at Volcan de Colima, Mexico. Frontiers in Earth Science. 7. DOI: 10.3389/Feart.2019.00084.

Watson, R.A., E.P. Holohan, D. Al-Halbouni, L. Saberi, A. Sawarieh, D. Closson, H. Alrshdan, N. Abou Karaki, C. Siebert, T.R. Walter, and T. Dahm, 2019, Sinkholes and uvalas in evaporite karst: spatio-temporal development with links to base-level fall on the eastern shore of the Dead Sea. Solid Earth. 10(4): p. 1451-1468. DOI: 10.5194/se-10-1451-2019.

Walter, T.R., C.E. Harnett, N. Varley, D.V. Bracamontes, J. Salzer, E.U. Zorn, M. Breton, R. Arambula, and M.E. Thomas, 2019, Imaging the 2013 explosive crater excavation and new dome formation at Volcan de Colima with TerraSAR-X, time-lapse cameras and modelling. Journal of Volcanology and Geothermal Research. 369: p. 224-237. DOI: 10.1016/j.jvolgeores.2018.11.016.

Walter, T.R., M.H. Haghighi, F.M. Schneider, D. Coppola, M. Motagh, J. Saul, A. Babeyko, T. Dahm, V.R. Troll, F. Tilmann, S. Heimann, S. Valade, R. Triyono, R. Khomarudin, N. Kartadinata, M. Laiolo, F. Massimetti, and P. Gaebler, 2019, Complex hazard cascade culminating in the Anak Krakatau sector collapse. Nature Communications. 10. DOI: 10.1038/S41467-019-12284-5.

Valade, S., A. Ley, F. Massimetti, O. D'Hondt, M. Laiolo, D. Coppola, D. Loibl, O. Hellwich, and T.R. Walter, 2019, Towards Global Volcano Monitoring Using Multisensor Sentinel Missions and Artificial Intelligence: The MOUNTS Monitoring System. Remote Sensing. 11(13). DOI: 10.3390/Rs11131528.

Plank, S., T.R. Walter, S. Martinis, and S. Cesca, 2019, Growth and collapse of a littoral lava dome during the 2018/19 eruption of Kadovar Volcano, Papua New Guinea, analyzed by multi-sensor satellite imagery. Journal of Volcanology and Geothermal Research. 388. DOI: 10.1016/j.jvolgeores.2019.106704.

Namiki, A., E. Rivalta, H. Woith, T. Willey, S. Parolai, and T.R. Walter, 2019, Volcanic activities triggered or inhibited by resonance of volcanic edifices to large earthquakes. Geology. 47(1): p. 67-70. DOI: 10.1130/G45323.1.

Mania, R., T.R. Walter, M. Belousova, A. Belousov, and S.L. Senyukov, 2019, Deformations and Morphology Changes Associated with the 2016-2017 Eruption Sequence at Bezymianny Volcano, Kamchatka. Remote Sensing. 11(11). DOI: 10.3390/Rs11111278.

Heap, M.J., V.R. Troll, A.R.L. Kushnir, H.A. Gilg, A.S.D. Collinson, F.M. Deegan, H. Darmawan, N. Seraphine, J. Neuberg, and T.R. Walter, 2019, Hydrothermal alteration of andesitic lava domes can lead to explosive volcanic behaviour. Nature Communications. 10. DOI: 10.1038/S41467-019-13102-8.

Gaete, A., J.L. Kavanagh, E. Rivalta, S.H. Hazim, T.R. Walter, and D.J.C. Dennis, 2019, The impact of unloading stresses on post-caldera magma intrusions. Earth and Planetary Science Letters. 508: p. 109-121. DOI: 10.1016/j.epsl.2018.12.016.

Gaete, A., S. Cesca, L. Franco, J. San Martin, C. Cartes, and T.R. Walter, 2019, Seismic activity during the 2013-2015 intereruptive phase at Lascar volcano, Chile. Geophysical Journal International. 219(1): p. 449-463. DOI: 10.1093/gji/ggz297.

Dahm, T., Wörner, G., Ritter, J., Walter, T. R. (2019): Vulkanismus in der Eifel - Wissenschaftliche Einschätzung, Bewertung aktueller Prozesse und Forschungsbedarf. - Mitteilungen / Deutsche Geophysikalische Gesellschaft, 2, 5-15.

Diao, F.Q., X. Xiong, R.J. Wang, T.R. Walter, Y.B. Wang, and K. Wang, 2019, Slip Rate Variation Along the Kunlun Fault (Tibet): Results From New GPS Observations and a Viscoelastic Earthquake-Cycle Deformation Model. Geophysical Research Letters. 46(5): p. 2524-2533. DOI: 10.1029/2019GL081940.

Astort, A., T.R. Walter, F. Ruiz, L. Sagripanti, A. Nacif, G. Acosta, and A. Folguera, 2019, Unrest at Domuyo Volcano, Argentina, Detected by Geophysical and Geodetic Data and Morphometric Analysis. Remote Sensing. 11(18). DOI: 10.3390/Rs11182175.

Witt, T., T.R. Walter, D. Muller, M.T. Gudmundsson, and A. Schopa, 2018, The Relationship Between Lava Fountaining and Vent Morphology for the 2014-2015 Holuhraun Eruption, Iceland, Analyzed by Video Monitoring and Topographic Mapping. Frontiers in Earth Science. 6. DOI: 10.3389/Feart.2018.00235.

Walter, T.R., J. Salzer, N. Varley, C. Navarro, R. Arambula-Mendoza, and D. Vargas-Bracamontes, 2018, Localized and distributed erosion triggered by the 2015 Hurricane Patricia investigated by repeated drone surveys and time lapse cameras at Volcan de Colima, Mexico. Geomorphology. 319: p. 186-198. DOI: 10.1016/j.geomorph.2018.07.020.

Richter, N., J.T. Salzer, E. de Zeeuw-van Dalfsen, D. Perissin, and T.R. Walter, 2018, Constraints on the geomorphological evolution of the nested summit craters of Lascar volcano from high spatio-temporal resolution TerraSAR-X interferometry. Bulletin of Volcanology. 80(3). DOI: 10.1007/s00445-018-1195-3.

Durig, T., M.T. Gudmundsson, F. Dioguardi, M. Woodhouse, H. Bjornsson, S. Barsotti, T. Witt, and T.R. Walter, 2018, REFIR-A multi-parameter system for near real-time estimates of plume-height and mass eruption rate during explosive eruptions. Journal of Volcanology and Geothermal Research. 360: p. 61-83. DOI: 10.1016/j.jvolgeores.2018.07.003.

Diao, F.Q., R.J. Wang, Y.B. Wang, X. Xiong, and T.R. Walter, 2018, Fault behavior and lower crustal rheology inferred from the first seven years of postseismic GPS data after the 2008 Wenchuan earthquake. Earth and Planetary Science Letters. 495: p. 202-212. DOI: 10.1016/j.epsl.2018.05.020.

Darmawan, H., T.R. Walter, V.R. Troll, and A. Budi-Santoso, 2018, Structural weakening of the Merapi dome identified by drone photogrammetry after the 2010 eruption. Natural Hazards and Earth System Sciences. 18(12): p. 3267-3281. DOI: 10.5194/nhess-18-3267-2018.

Darmawan, H., T.R. Walter, K.S. Brotopuspito, Subandriyo, and I.G.M.A. Nandaka, 2018, Morphological and structural changes at the Merapi lava dome monitored in 2012-15 using unmanned aerial vehicles (UAVs). Journal of Volcanology and Geothermal Research. 349: p. 256-267. DOI: 10.1016/j.jvolgeores.2017.11.006.

Bredemeyer, S., F.G. Ulmer, T.H. Hansteen, and T.R. Walter, 2018, Radar Path Delay Effects in Volcanic Gas Plumes: The Case of Lascar Volcano, Northern Chile. Remote Sensing. 10(10). DOI: 10.3390/Rs10101514.

Zimmer, M., T.R. Walter, C. Kujawa, A. Gaete, and L. Franco-Marin, 2017, Thermal and gas dynamic investigations at Lastarria volcano, Northern Chile. The influence of precipitation and atmospheric pressure on the fumarole temperature and the gas velocity. Journal of Volcanology and Geothermal Research. 346: p. 134-140. DOI: 10.1016/j.jvolgeores.2017.03.013.

Zhang, Y., R.J. Wang, T.R. Walter, W.P. Feng, Y.S. Chen, and Q.H. Huang, 2017, Significant lateral dip changes may have limited the scale of the 2015 M-w 7.8 Gorkha earthquake. Geophysical Research Letters. 44(17): p. 8847-8856. DOI: 10.1002/2017GL074095.

Witt, T. and T.R. Walter, 2017, Video monitoring reveals pulsating vents and propagation path of fissure eruption during the March 2011 Pu'u 'O'o eruption, Kilauea volcano. Journal of Volcanology and Geothermal Research. 330: p. 43-55. DOI: 10.1016/j.jvolgeores.2016.11.012.

Salzer, J.T., P. Milillo, N. Varley, D. Perissin, M. Pantaleo, and T.R. Walter, 2017, Evaluating links between deformation, topography and surface temperature at volcanic domes: Results from a multi-sensor study at Volcan de Colima, Mexico. Earth and Planetary Science Letters. 479: p. 354-365. DOI: 10.1016/j.epsl.2017.09.027.

Nikkhoo, M., T.R. Walter, P.R. Lundgren, and P. Prats-Iraola, 2017, Compound dislocation models (CDMs) for volcano deformation analyses. Geophysical Journal International. 208(2): p. 877-894. DOI: 10.1093/gji/ggw427.

Muller, D., T.R. Walter, A. Schopa, T. Witt, B. Steinke, M.T. Gudmundsson, and T. Durig, 2017, High-Resolution Digital Elevation Modeling from TLS and UAV Campaign Reveals Structural Complexity at the 2014/2015 Holuhraun Eruption Site, Iceland. Frontiers in Earth Science. 5. DOI: 10.3389/Feart.2017.00059.

Maccaferri, F., N. Richter, and T.R. Walter, 2017, The effect of giant lateral collapses on magma pathways and the location of volcanism. Nature Communications. 8. DOI: 10.1038/S41467-017-01256-2.

Holohan EP, Sudhaus H, Walter TR, Schöpfer MPJ, Walsh JJ (2017) Effects of Host-rock Fracturing on Elastic-deformation Source Models of Volcano Deflation. Scientific Reports 7, 10970, doi:10.1038/s41598-017-10009-6.

  Richter N, Salzer JT, de Zeeuw van Dalfsen E, Perissin D, Walter TR (2017) Exceptional spatio-temporal resolution of complex deformation within the nested summit craters of Láscar Volcano, Chile. Bulletin of Volcanology, BUVO-D-17-00076, doi: 2017.00059.

  Zhang Y, Wang R, Walter TR, Feng W, Chen Y, Huang Q (2017) Significant Lateral Dip Changes May Have Limited the Scale of the 2015 Mw7.8 Gorkha Earthquake. Geophys. Res. Lett., doi: 10.1002/2017GL074095.

  Salzer JT, Milillo P, Varley N, Perissin D, Pantaleo M, Walter TR (2017) Evaluating links between deformation, topography and surface temperature at volcanic domes: Results from a multi-sensor study at Volcan de Colima, Mexico. Earth and Planetary Science Letters, doi: 00059.

  Müller D, Walter TR, Schöpa A, Witt T, Steinke B, Gudmundsson MT, Dürig T (2017) High-Resolution Digital Elevation Modeling from TLS and UAV Campaign Reveals Structural Complexity at the 2014/2015 Holuhraun Eruption Site, Iceland. Front. Earth Sci., 27 July 2017,

  Zimmer M, Walter TR, Kujawa C, Gaete A, Franco-Marin L (2017) Thermal and gas dynamic investigations at Lastarria volcano, Northern Chile. The influence of precipitation and atmospheric pressure on the fumarole temperature and the gas velocity. Journal of Volcanology and Geothermal Research,

Al-Halbouni D, Holohan E, Saberi L, Alrshdan H, Sawarieh A, Closson D, Walter TR, Dahm T (2017) Sinkholes, subsidence and subrosion on the eastern shore of the Dead Sea as revealed by a close-range photogrammetric survey. Geomorphology, 285, p. 305-324,

de Zeeuw-van Dalfsen E, Richter N, González G, Walter TR (2017) Geomorphology and structural development of the nested summit crater of Láscar Volcano studied with Terrestrial Laser Scanner data and analogue modelling. - Journal of Volcanology and Geothermal Research, 329, p. 1-12,

  Eibl EPS, Bean CJ, Jónsdóttir I, Höskuldsson A, Thordarson T, Coppola D, Witt T, Walter TR (2017) Multiple coincident eruptive seismic tremor sources during the 2014-2015 eruption at Holuhraun, Iceland. - Journal of Geophysical Research, 122, 4, p. 2972-2987,

Nikkhoo M, Walter TR, Lundgren PR, Prats-Iraola P (2017) Compound dislocation models (CDMs) for volcano deformation analyses. - Geophysical Journal International, 208, 2, p. 877-894,

Witt T, Walter TR (2017) Video monitoring reveals pulsating vents and propagation path of fissure eruption during the March 2011 Pu'u 'Ō'ō eruption, Kilauea volcano. Journal of Volcanology and Geothermal Research, 330, p. 43-55,

Diao F, Walter TR, Minati F, Wang R, Costantini M, Ergintav S, Xiong X, Prats-Iraola P (2016) Secondary Fault Activity of the North Anatolian Fault near Avcilar, Southwest of Istanbul: Evidence from SAR Interferometry Observations. - Remote Sensing, 8, 10,

  Gudmundsson, M. T., Jonsdottir, K., Hooper, A., Holohan, E. P., Halldorsson, S. A., Ofeigsson, B. G., Cesca, S., Vogfjord, K. S., Sigmundsson, F., Hognadottir, T., Einarsson, P., Sigmarsson, O., Jarosch, A. H., Jonasson, K., Magnusson, E., Hreinsdottir, S., Bagnardi, M., Parks, M. M., Hjorleifsdottir, V., Palsson, F., Walter, T. R., Schopfer, M. P. J., Heimann, S., Reynolds, H. I., Dumont, S., Bali, E., Gudfinnsson, G. H., Dahm, T., Roberts, M. J., Hensch, M., Belart, J. M. C., Spaans, K., Jakobsson, S., Gudmundsson, G. B., Fridriksdottir, H. M., Drouin, V., Durig, T., Athalgeirsdottir, G., Riishuus, M. S., Pedersen, G. B. M., van Boeckel, T., Oddsson, B., Pfeffer, M. A., Barsotti, S., Bergsson, B., Donovan, A., Burton, M. R., Aiuppa, A. (2016): Gradual caldera collapse at Bardarbunga volcano, Iceland, regulated by lateral magma outflow. - Science, 353, 6296.

Musiol, S., Holohan, E., Cailleau, B., Platz, T., Dumke, A., Walter, T. R., Williams, D. A., van Gasselt, S. (2016): Lithospheric flexure and gravity spreading of Olympus Mons volcano, Mars. - Journal of Geophysical Research, 121, p. 255-272,

Namiki, A., Rivalta, E., Woith, H., Walter, T. R. (2016): Sloshing of a bubbly magma reservoir as a mechanism of triggered eruptions. - Journal of Volcanology and Geothermal Research, 320, p. 156-171,

  Nikolaeva, E., Walter, T. R. (2016): InSAR observations of the 2009 Racha earthquake, Georgia. - Natural Hazards and Earth System Sciences (NHESS), 16, p. 2137-2144.

Richter, N., Favalli, M., de Zeeuw-van Dalfsen, E., Fornaciai, A., da Silva Fernandes, R. M., Pérez, N. M., Levy, J., Victória, S. S., Walter, T. R. (2016): Lava flow hazard at Fogo Volcano, Cabo Verde, before and after the 2014-2015 eruption. - Natural Hazards and Earth System Sciences (NHESS), 16, p. 1925-1951,

Salzer, J. T., Thelen, W. A., James, M. R., Walter, T. R., Moran, S., Denlinger, R. (2016): Volcano dome dynamics at Mount St. Helens: Deformation and intermittent subsidence monitored by seismicity and camera imagery pixel offsets. - Journal of Geophysical Research, 121, 11, p. 7882-7902,

F Diao, F.Q., T.R. Walter, G. Solaro, R.J. Wang, M. Bonano, M. Manzo, S. Ergintav, Y. Zheng, X. Xiong, and R. Lanari, Fault locking near Istanbul: indication of earthquake potential from InSAR and GPS observations. Geophysical Journal International, 2016. 205(1): p. 490-498.

F Diao, TR Walter, M Motagh, P Prats-Iraola, R Wang, SV Samsonov (2016) Rapid kinematic finite-fault inversion for a Mw 7+ scenario earthquake in the Marmara Sea: an uncertainty study. Geophys. J. Int. 204, 813–824. doi: 10.1093/gji/ggv459.

Prats-Iraola P, Nannini M, Scheiber R, De Zan F, Wollstadt S, Minati F, Vecchioli F, Costantini M, Borgstrom S, De Martino P, Siniscalchi V, Walter TR, Foumelis M, Desnos Y-L (2015) Sentinel-1 assessment of the interferometric wide-swath mode. IEEE International, doi: 10.1109/IGARSS.2015.7327018.

F Diao, TR Walter, M Motagh, P Prats-Iraola, R Wang, SV Samsonov (2015) The 2015 Gorkha earthquake investigated from radar satellites: slip and stress modeling along the MHT. Frontiers in Earth Science 3, 65. doi: 10.3389/feart.2015.00065.

M Nikkhoo, TR Walter (2015) Triangular dislocation: an analytical, artefact-free solution. Geophys. J. Int. (2015) 201, 1119–1141. doi: 10.1093/gji/ggv035.

H Bathke, M Nikkhoo, E P Holohan, TR Walter (2015) Insights into the 3D architecture of an active caldera ring-fault atTendürek volcano through modeling of geodetic data. Earth and Planetary Science Letters 422, 157–168. doi: 10.1016/j.epsl.2015.03.041.

Spica Z, Legrand D, Iglesias A, Walter TR, Heimann S, Dahm T, Froger J-L, Rémy D, Bonvalot S, West M, Pardo M (2015) Hydrothermal and magmatic reservoirs at Lazufre volcanic area, revealed by a high-resolution seismic noise tomography. Earth and Planetary Science Letters 421, 27–38. doi: 10.1016/j.epsl.2015.03.042.

TR Walter, Subandriyo J, Kirbani S, Bathke H, Suryanto W, Aisyah N, Darmawan H, Jousset P, Lühr BG, Dahm T (2015) Volcano-tectonic control of Merapi’s lava dome splitting: The November 2013 fracture observed from high resolution TerraSAR-X data. Tectonophysics 639, 23–33. doi:10.1016/j.tecto.2014.11.007.

N Le Corvec, TR Walter, J Ruch, A Bonforte, G Puglisi (2014) Experimental study of the interplay between magmatic rift intrusion and flank instability with application to the 2001 Mount Etna eruption. Journal of Geophysical Research: Solid Earth 119 (7), 5356-5368.

Kervyn M, van Wyk de Vries B, Walter TR, Njome MS, Suh CE, Ernst G (2014) Directional flank spreading at Mount Cameroon volcano: Evidence from analogue modeling. Journal of Geophysical Research: Solid Earth 119 (10), 7542–7563, doi: 10.1002/2014JB011330.

JT Salzer, M Nikkhoo, TR Walter, H Sudhaus, G Reyes-Dávila, M Bretón, R. Arambula (2014) Satellite radar data reveal short-term pre-explosive displacements and a complex conduit system at Volcán de Colima, Mexico. Front. Earth Sci., 27 June 2014 | doi: 10.3389/feart.2014.00012.

TR Walter, M Shirzaei, A Manconi, G Solaro, A Pepe, M Manzo, E Sansosti (2014) Possible coupling of Campi Flegrei and Vesuvius as revealed by InSAR time series, correlation analysis and time dependent modeling. Journal of Volcanology and Geothermal Research 280, 1, 104–110. doi:10.1016/j.jvolgeores.2014.05.006.      


Tu R, Wang RJ, Walter TR, Diao F (2014) Adaptive recognition and correction of baseline shifts from collocated GPS and accelerometer using two phases Kalman filter.  Advances in Space Research 54, 1924–1932. doi: 10.1016/j.asr.2014.07.008.

Tu R, Wang RJ, Zhan Y, Walter TR (2014) Application of a net-based baseline correction scheme to strong-motion records of the 2011 Mw 9.0 Tohoku earthquake.  Geophys. J. Int. (June, 2014) 197 (3): 1808-1821. doi: 10.1093/gji/ggu092.

Walter TR, Motagh M (2014) Deflation and inflation of a large magma body beneath Uturuncu volcano, Bolivia? Insights from InSAR data, surface lineaments and stress modelling.  Geophys. J. Int. 198 (1), 462-473. doi: 10.1093/gji/ggu080.

Pantaleo M, Walter TR (2014) The ring-shaped thermal field of Stefanos crater, Nisyros Island: a conceptual model. Solid Earth, 5, 183-198, 2014. doi:10.5194/se-5-183-2014.

E Nikolaeva, TR Walter, M Shirzaei, J Zschau (2014) Landslide observation and volume estimation in central Georgia based on L-band InSAR. Natural Hazards and Earth System Science 14 (3), 675-688. doi:10.5194/nhess-14-675-2014.

F Diao, X Xiong, R Wang, Y Zheng, TR Walter, H Weng, J Li (2014) Overlapping post-seismic deformation processes: afterslip and viscoelastic relaxation following the 2011 Mw 9.0 Tohoku (Japan) earthquake.  Geophys. J. Int. (January, 2014) 196 (1): 218-229. doi: 10.1093/gji/ggt376.

Tu R, Ge MR, Wang RJ, Walter TR (2014) A new algorithm for tight integration of real-time GPS and strong-motion records, demonstrated on simulated, experimental, and real seismic data. J Seismol 18(1):151-61. doi: 10.1007/s10950-013-9408-x.

Wang RJ, Parolai S, Ge MR, Jin MP, Walter TR, Zschau J (2013) The 2011 M-w 9.0 Tohoku Earthquake: Comparison of GPS and Strong-Motion Data. B Seismol Soc Am103(2B):1336-47. doi: 10.1785/0120110264.

Walter TR, Ratdomopurbo A, Subandriyo, Aisyah N, Brotopuspito KS, Salzer J, Luehr B (2013) Dome growth and coulee spreading controlled by surface morphology, as determined by pixel offsets in photographs of the 2006 Merapi eruption. J Volcanol Geoth Res 261:121-9. doi: 10.1016/j.jvolgeores.2013.02.004.

Walter TR, Legrand D, Granados HD, Reyes G, Arambula R. Volcanic eruption monitoring by thermal image correlation: Pixel offsets show episodic dome growth of the Colima volcano. J Geophys Res 118(4):1408-19. doi: 10.1002/Jgrb.50066.

Tu R, Wang R, Ge M, Walter TR, Ramatschi M, Milkereit C, Bindi D, Dahm T (2013) Cost-effective monitoring of ground motion related to earthquakes, landslides, or volcanic activity by joint use of a single-frequency GPS and a MEMS accelerometer. Geophys Res Lett 40(15):3825-9. doi: 10.1002/Grl.50653.

Shirzaei M, Walter TR, Buergmann R. Coupling of Hawaiian volcanoes only during overpressure condition. Geophys Res Lett 40(10):1994-9. doi: 10.1002/Grl.50470.

Shirzaei M, Burgmann R, Foster J, Walter TR, Brooks B (2013) Aseismic deformation across the Hilina fault system, Hawaii, revealed by wavelet analysis of InSAR  and GPS time series. Earth and Planetary Science Letters, Doi: EPSL-D-12-01178R110.1002/grl.50653.

Holohan EP, Walter TR, Schopfer MPJ, Walsh JJ, de Vries BV, Troll VR (2013) Origins of oblique-slip faulting during caldera subsidence. J Geophys Res 118(4):1778-94. doi: 10.1002/Jgrb.50057.

Bathke H, Sudhaus H, Holohan EP, Walter TR, Shirzaei M (2013) An active ring fault detected at Tendurek volcano by using InSAR. J Geophys Res 118(8):4488-502. Doi 10.1002/Jgrb.50305.

Shirzaei M, Burgmann R, Oncken O, Walter TR, Victor P, Ewiak O (2012) Response of forearc crustal faults to the megathrust earthquake cycle: InSAR evidence from Mejillones Peninsula, Northern Chile. Earth Planet Sc Lett 333:157-64. doi: 10.1016/j.epsl.2012.04.001.

Ruch J, Warren JK, Risacher F, Walter TR, Lanari R (2012) Salt lake deformation detected from space. Earth Planet Sc Lett 331:120-7. doi: 10.1016/j.epsl.2012.03.009.

Walter TR, Ruch J, Manconi A, Shirzaei M, Motagh M, Anderssohn J (2011) Doming of Lazufre (in German: Die "Beule" von Lazufre). System Erde, 1,1, doi: 10.2312/GFZ.syserde.01.01.5.

Walter TR (2011) Low cost volcano deformation monitoring: optical strain measurement and application to Mount St. Helens data. Geophys J Int 186(2):699-705. doi: 10.1111/j.1365-246X.2011.05051.x.

Walter TR (2011) Structural architecture of the 1980 Mount St. Helens collapse: An analysis of the Rosenquist photo sequence using digital image correlation. Geology 39(8):767-70. doi: 10.1130/G32198.1.

Walter TR (2011) Monitoring of volcanoes (in German: Monitoring von Vulkanen). Geographische Rundschau, 63 (6), 45-51. ISSN: 0016-7460.

Schöpa A, Pantaleo M, Walter TR (2011) Scale dependent location of hydrothermal vents: Stress field models and infrared field observations on the Fossa Cone, Vulcano Island, Italy. Journal of Volcanology and Geothermal Research, accepted manuscript, in press.

Shirzaei M, Walter TR (2011) Estimating the effect of satellite orbital error using wavelet based robust regression applied to InSAR deformation data. IEEE, Transaction of Geoscience and Remote Sensing, 99, 1-6, doi: 10.1109/TGRS.2011.2143419.

Platz T, Münn S, Walter TR, Procter JN, McGuire PC, Dumke A, Neukum G (2011) Vertical and lateral collapse of Tharsis Tholus, Mars. Earth and Planetary Science Letters, 305 (3-4), 445-455, doi:10.1016/j.epsl.2011.03.012.

Bathke H, Shirzaei M, Walter TR (2011) Inflation and deflation at the steep-sided Llaima stratovolcano (Chile) detected by using InSAR. Geophys. Res. Lett., 38, L10304, doi:10.1029/2011GL047168.

Carracedo JC, Fernandez-Turiel JL, Gimeno D, Guillou H, Klügel A, Krastel S, Paris R, Perez-Torrado FJ, Rodriguez-Badiolah E, Rodriguez-Gonzalez A, Troll VR, Walter TR, Wiesmaier S (2011) Comment on “The distribution of basaltic volcanism on Tenerife, Canary Islands: Implications on the origin and dynamics of the rift systems” by A. Geyer and J. Martí. Tectonophysics 483 (2010) 310–326, doi:10.1016/j.tecto.2010.10.015.

Shirzaei M, Walter TR, Nankali HR, Holohan E (2011) Gravity-driven deformation of Damavand volcano, Iran, detected through InSAR time series. Geology, 39(3), 251-254, doi: 10.1130/ G31779.1.

Ruch J, Walter TR (2010) The relationship between current uplift geometry revealed by InSAR, structural framework, and the present-day stress field at Lazufre volcanic area, central Andes. Tectonophysics, 492, 133–140 doi:10.1016/j.tecto.2010.06.003.

Walter TR, Manzo M, Manconi A, Solaro G, Lanari R, Motagh M, Woith H, Parolai S, Shirzaei M, Zschau J, Baris S, Ansal A (2010) Geohazard Supersite: InSAR monitoring at Istanbul city. EOS, Transactions, Vol 91, 36, 313–324.

Shirzaei M, Walter TR (2010) Time-dependent volcano source monitoring using InSAR time series: A combined Genetic Algorithm and Kalman Filter approach. Journal of Geophysical Research, Vol. 115, B10421, doi:10.1029/2010JB007476.

see the MATLAB code which utilizes RISC-GA-KF approach for inverting InSAR time series (paper auxilary material)

Motagh M, Schurr B, Anderssohn J, Cailleau B, Walter TR, Wang R, Villotte J-P (2010) Subduction earthquake deformation associated with 14 November 2007, Mw 7.8 Tocopilla earthquake in Chile: Results from InSAR and aftershocks. Tectonophysics,  Volume 490, Issues 1-2, doi:10.1016/j.tecto.2010.04.033.

Manconi A, Walter TR, Manzo M, Zeni G, Tizzani P, Sansosti E, Lanari R (2010) An effective approach to account for the effects of 3-D mechanical heterogeneities at Campi Flegrei caldera, Southern Italy, by using standard source deformation models. Journal of Geophysical Research, VOL. 115, B08405, doi:10.1029/2009JB007099.

Burchardt S. Walter TR (2010) Propagation, linkage, and interaction of caldera ring-faults: comparison between analogue experiments and caldera collapse at Miyakejima, Japan, in 2000. Bulletin of Volcanology, 72 (3), 297-308, doi: 10.1007/s00445-009-0321-7.

Andersohn J, Motagh M, Walter TR, Roseneau M, Kaufmann H, Oncken O (2009) Surface deformation time series and source modeling for a volcanic complex system based on satellite wide swath and image mode interferometry: The Lazufre system, central Andes. Remote Sensing of Environment 113 (2009) 2062–2075.

Shirzaei M, TR Walter (2009) Randomly iterated search and statistical competency as powerful inversion tools for deformation source modeling: Application to volcano interferometric synthetic aperture radar data, J. Geophys. Res., 114, B10401, doi:10.1029/2008JB006071.

Ruch J, A Manconi, G Zeni, G Solaro, A Pepe, M Shirzaei, T R Walter, R Lanari (2009) Stress transfer in the Lazufre volcanic area, central Andes, Geophys. Res. Lett., 36, L22303, doi:10.1029/2009GL041276.

Manconi A, Longpré M-A, Walter TR, Troll VR, Hansteen TH (2009) Effects of flank collapse on a volcano’s magma plumbing system. Geology 37(12), 1099-1102, DOI: 10.1130/G30104A.1.

Longpré M-A, Troll VR, Walter TR, Hansteen TH (2009) Volcanic and geochemical evolution of the Teno massif, Tenerife (Canary Islands): some repercussions of giant landslides on ocean island magmatism. G-cubed 10, Q12017, doi:10.1029/2009GC002892.

Acocella V, Neri M, Walter TR (2009) Structural features of Panarea volcano in the frame of the Aeolian Arc (Italy): implications for the 2002-2003 unrest. Journal of Geodynamics, 47, 288-292, DOI: 10.1016/j.jog.2009.01.004.

Le Corvec N, Walter TR (2009) Volcano spreading and fault interaction influenced by rift-zone dike intrusion: Insights from analog experiments analyzed with digital image correlation. Journal of Volcanology and Geothermal Research, 183, 170-182, DOI: 10.1016/j.jvolgeores.2009.02.006.

Walter TR, Wang R, Acocella V, Neri M, Grosser H, Zschau J (2009) Simultaneous magma and gas eruptions at three volcanoes in southern Italy: an earthquake trigger?. GEOLOGY, 37(3), 251-254, DOI: 10.1130/G25396A.1.

Alipour, S.; Motagh, M.; Sharifi, M.A.; Walter, T.R. (2009) InSAR time series investigation of land subsidence due to groundwater overexploitation in Tehran, Iran. IEEE. DOI: 10.1109/USEREST.2008.4740370.

Eggert S, Walter TR (2009) Volcanic activity before and after large tectonic earthquakes: Observations and statistical significance. Tectonophysics, DOI: 10.1016/j.tecto.2008.10.003.

Motagh M, Wang R, Walter TR, Bürgmann R, Fielding E, Anderssohn J, Zschau J (2008) Coseismic slip model of the 2007 August Pisco earthquake (Peru) as constrained by Wide Swath radar observations. Geophysical Journal International, 174, Issue 2, pp. 842-848, Doi: 10.1111/j.1365-246X.2008.03852.x.

Motagh M, Walter TR, Ali Sharifi M, Fielding E, Schenk A, Anderssohn J, Zschau J (2008) Land subsidence in Iran caused by widespread water-reservoir overexploitation. Geophysical Research Letters, 35, L16403, doi:10.1029/2008GL033814.

(editors highlight summary by GRL)

Anderssohn J, Wetzel H-U, Walter T R, Motagh M, Djamour Y, Kaufmann H (2008) Land subsidence pattern controlled by old alpine basement faults in the Kashmar Valley, northeast Iran: Results from InSAR, levelling and imaging spectrometry. Geophysical Journal International, 174 (1), 287-294, doi:10.1111/j.1365-246X.2008.03805.x.

Donoghuea E, Troll VR, Harris C, O’Halloran A, Walter TR, Pérez-Torrado F. (2008) Low-temperature hydrothermal alteration of intra-caldera tuffs, Miocene Tejeda caldera, Gran Canaria, Canary Islands. Journal of Volcanology and Geothermal Research, 176(4), 551-564, doi:10.1016/j.jvolgeores.2008.05.002.

Holohan E, Troll VR, van Wyk de Vries B, Walsh J, Walter TR (2008) Unzipping Long Valley: an explanation for vent migration patterns during an elliptical ring fracture eruption. Geology 36 (4), 323–326, doi: 10.1130/G24329A.

Ruch J, Anderssohn J, Walter TR, Motagh M (2008) Caldera-scale inflation of the Lazufre volcanic area, South America, evidenced by InSAR. Journal of Volcanology and Geothermal Research, 174 (4), 337-344, doi:10.1016/j.jvolgeores.2008.03.009.

Walter T R, Wang R, Luehr B-G, Wassermann J, Behr Y, Parolai S, Anggraini A, Günther E, Sobiesiak M, Grosser H, Wetzel H-U, Milkereit C, Sri Brotopuspito K, Prih Harjadi, Zschau J (2008) The 26 May 2006 magnitude 6.4 Yogyakarta earthquake south of Mt. Merapi volcano: Did lahar deposits amplify ground shaking and thus lead to the disaster?, G-cubed: Geochemistry Geophysics Geosystems, 9, Q05006, doi:10.1029/2007GC001810.

Wagner D, Rabbel W, Luehr B-G, Wassermann J, Walter TR, Kopp H, Koulakov I, Wittwer A, Bohm M, Asch G, the MERAMEX Scientists (2008) Seismic structure of central Java . In: Karnawati, D. ; Pramumijoyo, S. ; Anderson, R. ; Husein, S (Eds.): The Yogyakarta Earthquake of May 27, 2006. Belmont, CA: Star Publ. Comp. ISBN 978-0-89863-304-7

Walter TR (2008)  Facilitating dyke intrusions into ring-faults. Book chapter in: Caldera Volcanism, 10 - Analysis, Modelling and Response (eds. J Gottsmann and J Marti). Elsevier Special Pub on Calderas, 336 pp, ISBN: 978-0-444-53165-0.

Walter T R, Lühr B-G, Sobiesiak M, Grosser H, Wang R, Parolai S, Wetzel H-U, Zschau J, Milkereit C, Günther E, Wassermann J, Behr Y, Anggraini A, Sri Brotopuspito K, Prih Harjadi (2007), Soft Volcanic Sediments Compound 2006 Java Earthquake Disaster, Eos Trans. AGU, 88(46), doi:10.1029/2007EO460002.

Walter TR (2007) How a tectonic earthquake may awake silent volcanoes: Stress triggering during the 1996 earthquake–eruption sequence at the Karymsky Volcanic Group, Kamchatka.  Earth and Planet. Sci. Letters. Vol. 264 (3-4), 347-359, doi: 10.1016/j.epsl.2007.09.006.

Manconi A, Walter TR, Amelung F (2007) Effects of mechanical layering on volcano deformation. Geophysical Journal International 170 (2), 952–958, doi: 10.1111/j.1365-246X.2007.03449.x..

Amelung F, Yun S-H, Walter T R, Segall P (2007) Stress control of deep rift intrusion at Mauna Loa volcano, Hawaii. SCIENCE 316 (5827), 1026 - 1030, doi: 10.1126/science.1140035.

Walter TR, Amelung F (2007) Volcanic eruptions following M≥9 megathrust earthquakes: Implications for the Sumatra-Andaman volcanoes. Geology, 35 (6), 539–542, doi: 10.1130/G23429A.1

(Electronic supplement)   (Geology cover image)

(read the research highlight summary by Science)

(read the research highlight summary by GSA)

Walter TR, Wang R, Zimmer M, Grosser H, Lühr B, Ratdomopurbo A (2007), Volcanic activity influenced by tectonic earthquakes: Static and dynamic stress triggering at Mt. Merapi, Geophys. Res. Lett., 34, L05304, doi:10.1029/2006GL028710.

Motagh M, Djamour Y, Walter T R, Wetzel H-U, Zschau J, Arabi S (2007) Land subsidence in Mashhad Valley, northeast Iran: results from InSAR, levelling and GPS. - Geophysical Journal International, 168 (2), 518-526, doi: 10.1111/j.1365-246X.2006.03246.x.

Walter TR, Amelung F (2006) Volcano-earthquake interaction at Mauna Loa Volcano, Hawaii. Journal of Geophysical Research, 111, B05204, doi:10.1029/2005JB003861.

Muenn S, Walter TR, Kluegel A (2006) Gravitational spreading controls rift zones and flank instability on El Hierro, Canary Islands. Geological Magazine, 143 (3), 257-268, doi: 10.1017/S0016756806002019.

Walter TR, Kluegel A, Muenn S (2006) Gravitational spreading and formation of new rift zones on overlapping volcanoes. Terra Nova, 18, 26–33, doi: 10.1111/j.1365-3121.2005.00656.x.

Walter TR, Acocella V, Neri M, Amelung F (2005) Feedback processes between magmatic events and flank movement at Mount Etna (Italy) during the 2002–2003 eruption. Journal of Geophysical Research, 110, B10205, doi:10.1029/2005JB003688.

Cailleau B, Walter TR, Janle P, Hauber E (2005) Unveiling the origin of radial grabens on Alba Patera volcano by finite element modeling. Icarus, International Journal of Solar System Studies, 176 (1), 44-56, doi:10.1016/j.icarus.2005.01.017.

Kluegel A, Walter TR, Schwarz S, Geldmacher J (2005) Gravitational spreading causes en-echelon diking along a rift zone of Madeira Archipelago: an experimental approach and implications for magma transport. Bulletin of Volcanology, 68, 37–46, doi 10.1007/s00445-005-0418-6.

Holohan EP, Troll VR, Walter TR, Muenn S, McDonnell S, Shipton ZK (2005) Elliptical calderas in active tectonic settings: an experimental approach. Journal of Volcanology and Geothermal Research, 144, 119– 136, doi:10.1016/j.jvolgeores.2004.11.020.

Belousov A, Walter TR, Troll V (2005) Large-scale failures on domes and stratovolcanoes situated on caldera ring faults: sand box modeling and natural examples from Kamchatka, Russia. Bulletin of Volcanology, 67, 457-4680, doi: 10.1007/s00445-004-0387-1.

Walter TR, Troll V, Cailleau B, Belousov A, Schmincke HU, Bogaard P, Amelung F (2005) Rift zone reorganization through flank instability on ocean island volcanoes: Tenerife, Canary Islands. Bulletin of Volcanology, 67, 281-291, doi: 10.1007/s00445-004-0352-z.

Walter TR, Amelung F (2004) Influence of volcanic activity at Mauna Loa, Hawaii, on earthquake occurrence in the Kaoiki Seismic Zone. Geophysical Research Letters, 31, L07622, doi:10.1029/2003GL019131.

Cailleau B, Walter TR, Janle P, Hauber E (2003) Modeling volcanic deformation in a regional stress field: Implications for the formation of graben structures on Alba Patera, Mars. Journal of Geophysical Research, 108 (E12), 5141, doi:10.1029/2003JE002135.

Walter TR, Troll V (2003) Experiments on rift zone formation near unstable flanks in volcanic edifices. Journal of Volcanology and Geothermal Research, 127, 107-120, doi:10.1016/S0377-0273(03)00181-1.

Walter TR (2003) Buttressing and fractional spreading of Tenerife; an experimental approach on the formation of rift zones. Geophysical Research Letters, 30 (6), 1296, doi:10.1029/2002GL016610.

Walter TR and Schmincke H-U (2002) Rifting, recurrent landsliding and Miocene structural reorganization on NW-Tenerife (Canary Islands). International Journal of Earth Science, 91, 615-628, doi: 10.1007/s00531-001-0245-8.

Grujic D, Walter TR, Gaertner H (2002) Shape and structure of (analogue models of) refolded layers. Journal of Structural Geology, 24 (8), 1313-1326, doi: 10.1016/S0191-8141(01)00134-1.

Troll VR, Walter TR and Schmincke H-U (2002) Cyclic caldera collapse: piston or piecemeal subsidence? Field and experimental evidence. Geology, 30 (2),135-138, doi: 10.1130/0091-7613(2002)030<0135:CCCPOP>2.0.CO;2.

Walter TR and Troll VR (2001) Formation of caldera periphery faults, an experimental study. Bulletin of Volcanology, 63, 191-203, doi: 10.1007/s004450100135.