bootstrap themes

Thomas R. Walter

Geophysics-Volcanology-Natural Hazards
Head of Research Team, GFZ Staff scientist,
Habilitation University Potsdam, PhD GEOMAR Kiel, MSc University Freiburg im Brsg.

Research fields

From deep intrusions to hazards in the geosphere. Study sites in Chile, Mexico, Iceland, Indonesia, Etna and elsewhere. 

>4M€

Funding

Raised third party funding for realization of research activities.

>100

Publications

Scientific publications, reports, books chapters.

>40

Supervision

Advisor of over 40 PhD students, MSc and BSc students and interns, field and technical training, teaching at University.

Research fields and processes

Mobirise

Dikes and fissures 

Magma travels along dikes, rift zones and fissures, which I study on Iceland and Ocean Islands all over the world. Recent works at Hekla, Holuhraun and the Geysers.

Mobirise

Volcano growth and collapse

Volcano construction and collapse processes often closely interact. At Merapi, i study dome growth, collapse and interactions with earthquakes.

Mobirise

Fumaroles and Geysers

Fumaroles, Geysers and hot pools offer a glimpse into complex solid-fluid interactions. They are a volcano analogue. See my publications from Iceland and Chile.

Mobirise

Earthquakes

Seismo-tectonics, that is the faulting and deformation occurrence associated with earthquakes. I study source processes and stress changes.

Mobirise

Structural analysis

One of my specialities is the structural analysis at volcanoes. Volcano-fault interactions and triggering are my favorites.

Mobirise

Field observations and monitoring

Monitoring volcano- and seismo-tectonic activities and process studies include satellite and UAV sensing and geophysical technologies.

Mobirise

Data processing

Change detection and data mining is essential. Photogrammetry and computer vision are increasingly being used by my team.

Mobirise

Modelling

Simulation of observed deformations and activity changes allows obtaining a glimpse into the deep earth.

Student supervision

If you are a student, seeking new challenges, are skilled in geosciences, remote sensing, geophysics and computation, and interested to learn new things, please contact me and we find a project for you!

Project funding

Mobirise

ERC consolidator project 

The aim of this project is to develop radar and time lapse photogrammetric technologies for volcano dome growth and collapse.

Mobirise

Geosphere EDA

The aim of this project is to use radar sensing technologies, pixel offsets and InSAR for natural hazards observations and for future satellite missions.

Mobirise

Geo.X project advisor

Geo.X is a joint initiative in Geoscience Institutions from the region Potsdam-Berlin. One aim is to explore sensors for volcano monitoring.

Mobirise

EPOS

European Plate Observing System: We are having contributions to volcano modelling and space observation workpackages.

Publications

Please find below the peer review publication list. Reprints available upon request.

  1. Al-Halbouni, D., Holohan, E., Saberi, L., Alrshdan, H., Sawarieh, A., Closson, D., Walter, T. R., 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. http://doi.org/10.1016/j.geomorph.2017.02.006 
  2. de Zeeuw-van Dalfsen, E., Richter, N., González, G., Walter, T. R. (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. http://doi.org/10.1016/j.jvolgeores.2016.09.018
  3. Eibl, E. P. S., Bean, C. J., Jónsdóttir, I., Höskuldsson, A., Thordarson, T., Coppola, D., Witt, T., Walter, T. R. (2017): Multiple coincident eruptive seismic tremor sources during the 2014-2015 eruption at Holuhraun, Iceland. - Journal of Geophysical Research, 122, 4, p. 2972-2987. http://doi.org/10.1002/2016JB013892
  4. Holohan, E., Sudhaus, H., Walter, T. R., Schöpfer, M. P. J., Walsh, J. J. (2017): Effects of Host-rock Fracturing on Elastic-deformation Source Models of Volcano Deflation. - Scientific Reports, 7. http://doi.org/10.1038/s41598-017-10009-6
  5. Maccaferri, F., Richter, N., Walter, T. R. (2017): The effect of giant lateral collapses on magma pathways and the location of volcanism. - Nature Communications, 8. http://doi.org/10.1038/s41467-017-01256-2
  6. Müller, D., Walter, T. R., Schöpa, A., Witt, T., Steinke, B., Gudmundsson, M. T., Dürig, T. (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. http://doi.org/10.3389/feart.2017.00059
  7. Nikkhoo, M., Walter, T. R., Lundgren, P. R., Prats-Iraola, P. (2017): Compound dislocation models (CDMs) for volcano deformation analyses. - Geophysical Journal International, 208, 2, p. 877-894. http://doi.org/10.1093/gji/ggw427
  8. Salzer, J. T., Milillo, P., Varley, N., Perissin, D., Pantaleo, M., Walter, T. R. (2017): Evaluating links between deformation, topography and surface temperature at volcanic domes: Results from a multi-sensor study at Volcán de Colima, Mexico. - Earth and Planetary Science Letters, 479, p. 354-365. http://doi.org/10.1016/j.epsl.2017.09.027
  9. Witt, T., Walter, T. R. (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. http://doi.org/10.1016/j.jvolgeores.2016.11.012
  10. Zhang, Y., Wang, R., Walter, T. R., Feng, W., Chen, Y., Huang, Q. (2017): Significant lateral dip changes may have limited the scale of the 2015 Mw7.8 Gorkha earthquake. - Geophysical Research Letters, 44, 17, p. 8847-8856. http://doi.org/10.1002/2017GL074095
  11. Zimmer, M., Walter, T. R., 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, 346, p. 134-140. http://doi.org/10.1016/j.jvolgeores.2017.03.013
  12. Diao, F., Wang, R., Aochi, H., Walter, T. R., Zhang, Y., Zheng, Y., Xiong, X. (2016): Rapid kinematic finite-fault inversion for Mw7+ scenario earthquake in the Marmara Sea: an uncertainty study. - Geophysical Journal International, 204, 2, p. 813-824. http://doi.org/10.1093/gji/ggv459
  13. Diao, F., Walter, T. R., 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. http://doi.org/10.3390/rs8100846
  14. Diao, F., Walter, T. R., Solaro, G., Wang, R., Bonano, M., Manzo, M., Ergintav, S., Zheng, Y., Xiong, X., and Lanari, R. (2016) Fault locking near Istanbul: indication of earthquake potential from InSAR and GPS observations. Geophysical Journal International, 2016. 205(1): p. 490-498. https://doi.org/10.1093/gji/ggw048
  15. 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. http://doi.org/10.1126/science.aaf8988
  16. 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. http://doi.org/10.1002/2015JE004896
  17. Prats-Iraola, P., Nannini, M., Yague-Martinez, N., Scheiber, R., Minati, F., Vecchioli, F., Costantini, M., Borgstrom, S., De Martino, P., Siniscalchi, V., Walter, T. R., Nikkhoo, M., Foumelis, M., Desnos, Y. (2016): Sentinel-1 tops interferometric time series results and validation. - In: 2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS): proceedings; July 10-15, 2016, Beijing, China, Piscataway, NJ : IEEE, p. 3894-3897. http://doi.org/10.1109/IGARSS.2016.7730011
  18. 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. http://doi.org/10.1016/j.jvolgeores.2016.03.010
  19. 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. http://doi.org/10.5194/nhess-16-2137-2016
  20. 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. http://doi.org/10.5194/nhess-16-1925-2016
  21. 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. http://doi.org/10.1002/2016JB013045
  22. Zorn, E., Walter, T. R. (2016): Influence of volcanic tephra on photovoltaic (PV)-modules: an experimental study with application to the 2010 Eyjafjallajökull eruption, Iceland. - Journal of Applied Volcanology, 5. http://doi.org/10.1186/s13617-015-0041-y
  23. Bathke, H., Nikkhoo, M., Holohan, E., Walter, T. R. (2015): Insights into the 3D architecture of an active caldera ring-fault at Tendürek volcano through modeling of geodetic data. - Earth and Planetary Science Letters, 422, p. 157-168. http://doi.org/10.1016/j.epsl.2015.03.041
  24. Diao, F., Walter, T. R., Motagh, M., Prats-Iraola, P., Wang, R., Samsonov, S. (2015): The 2015 Gorkha earthquake investigated from radar satellites: Slip and stress modeling along the MHT. - Frontiers in Earth Science, 3. http://doi.org/10.3389/feart.2015.00065
  25. Nikkhoo, M., Walter, T. R. (2015): Triangular dislocation: an analytical, artefact-free solution. - Geophysical Journal International, 201, 2, p. 1119-1141. http://doi.org/10.1093/gji/ggv035
  26. Spica, Z., Legrand, D., Iglesias, A., Walter, T. R., 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, p. 27-38. http://doi.org/10.1016/j.epsl.2015.03.042
  27. Walter, T. R., Subandriyo, J., Kirbani, S., Bathke, H., Suryanto, W., Aisyah, N., Darmawan, H., Jousset, P., Lühr, B., 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, p. 23-33. http://doi.org/10.1016/j.tecto.2014.11.007
  28. Diao, F., Xion, X., Wang, R., Zheng, Y., Walter, T. R., Weng, H., Li, J. (2014): Overlapping post-seismic deformation processes: afterslip and viscoelastic relaxation following the 2011 Mw 9.0 Tohoku (Japan) earthquake. - Geophysical Journal International, 196, 1, p. 218-229. http://doi.org/10.1093/gji/ggt376
  29. Kervyn, M., van Wyk de Vries, B., Walter, T. R., Njome, M. S., Suh, C. E., Ernst, G. G. J. (2014): Directional flank spreading at Mount Cameroon volcano: Evidence from analogue modeling. - Journal of Geophysical Research, 119, 10, p. 7542-7563. http://doi.org/10.1002/2014JB011330
  30. Walter, T. R. (2014): Vulkanische Risiken in Europa. - In: Becker, P., Hüttl, R. F. J. (Eds.), Forschungsfeld Naturgefahren, Offenbach : DWD, GFZ, p. 84-91.
  31. Le Corvec, N., Walter, T. R., Ruch, J., Bonforte, A., Puglisi, G. (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, 119, 7, p. 5356-5368. http://doi.org/10.1002/2014JB011224
  32. Nikolaeva, E., Walter, T. R., Shirzaei, M., Zschau, J. (2014): Landslide observation and volume estimation in central Georgia based on L-band InSAR. - Natural Hazards and Earth System Sciences (NHESS), 14, 3, p. 675-688. http://doi.org/10.5194/nhess-14-675-2014
  33. Pantaleo, M., Walter, T. R. (2014): The ring-shaped thermal field of Stefanos crater, Nisyros Island: a conceptual model. - Solid Earth, 5, 1, p. 183-198. http://doi.org/10.5194/se-5-183-2014
  34. Salzer, J. T., Nikkhoo, M., Walter, T. R., Sudhaus, H., Reyes-Davila, G., Breton, M., Arambula, R. (2014): Satellite radar data reveal short-term pre-explosive displacements and a complex conduit system at Volcan de Colima, Mexico. - Frontiers in Earth Science, 2, p. 1-11. http://doi.org/10.3389/feart.2014.00012
  35. Tu, R., Ge, M., Wang, R., Walter, T. R. (2014): A new algorithm for tight integration of real-time GPS and strong-motion records, demonstrated on simulated, experimental, and real seismic data. - Journal of Seismology, 18, 1, p. 151-161. http://doi.org/10.1007/s10950-013-9408-x
  36. Tu, R., Wang, R., Walter, T. R., 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, 9, p. 1924-1932. http://doi.org/10.1016/j.asr.2014.07.008
  37. Tu, R., Wang, R., Zhang, Y., Walter, T. R. (2014): Application of a net-based baseline correction scheme to strong-motion records of the 2011 Mw 9.0 Tohoku earthquake. - Geophysical Journal International, 197, 3, p. 1808-1821. http://doi.org/10.1093/gji/ggu092
  38. Walter, T. R., Motagh, M. (2014): Deflation and inflation of a large magma body beneath Uturuncu volcano, Bolivia? Insights from InSAR data, surface lineaments and stress modelling. - Geophysical Journal International, 198, 1, p. 462-473. http://doi.org/10.1093/gji/ggu080
  39. Becker, A., Becker, P., Brienen, S., Gratzki, A., Grünthal, G., Holzwarth, V., Hüttl, R. F. J., Kaminski, U., Kreibich, H., Koppe, C., Laschewski, G., Lauterjung, J., Lühr, H., Malitz, G., Merz, B., Rauthe, M., Rudolf, B., Rosenau, M., Roessner, S., Pilz, M., Parolai, S., Janssen, C., Haberland, C., Walter, A., Walter, T. R., Wichura, B., Wittich, K.-P.(2014): Forschungsfeld Naturgefahren, Offenbach : DWD, GFZ, (Becker, P., Hüttl, R. F. J., Eds.), 108 p. http://doi.org/10.2312/GFZ.2014.005
  40. Walter, T. R., Shirzaei, M., Manconi, A., Solaro, G., Pepe, A., Manzo, M., Sansosti, E. (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, p. 104-110. http://doi.org/10.1016/j.jvolgeores.2014.05.006
  41. Bathke, H., Sudhaus, H., Holohan, E., Walter, T. R., Shirzaei, M. (2013): An active ring fault detected at Tendürek volcano by using InSAR. - Journal of Geophysical Research, 118, 8, p. 4488-4502. http://doi.org/10.1002/jgrb.50305
  42. Holohan, E., Walter, T. R., Walsh, J. J., Van Wyk de Vries, B., Schöpfer, M. P. J., Troll, V. R. (2013): Origins of oblique-slip faulting during caldera subsidence. - Journal of Geophysical Research, 118, 4, p. 1778-1794. http://doi.org/10.1002/jgrb.50057
  43. Shirzaei, M., Bürgmann, R., Foster, J., Walter, T. R., 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, 376, p. 12-19. http://doi.org/10.1016/j.epsl.2013.06.011
  44. Shirzaei, M., Walter, T. R., Bürgmann, R. (2013): Coupling of Hawaiian volcanoes only during overpressure condition. - Geophysical Research Letters, 40, 10, p. 1994-1999. http://doi.org/10.1002/grl.50470
  45. Tu, R., Wang, R., Ge, M., Walter, T. R., 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. - Geophysical Research Letters, 40, p. 1-5. http://doi.org/10.1002/grl.50653
  46. Walter, T. R., Ratdomopurbo, A., Subandriyo, Nurnaning, A., Brotopuspito, K., Salzer, J. T., Lühr, B.-G. (2013): Dome growth and coulée spreading controlled by surface morphology, as determined by pixel offsets in photographs of the 2006 Merapi eruption. - Journal of Volcanology and Geothermal Research, 261, p. 121-129. http://doi.org/10.1016/j.jvolgeores.2013.02.004
  47. Walter, T. R., Legrand, D., Delgado Granados, H., Reyes, G., Arámbula, R. (2013): Volcanic eruption monitoring by thermal image correlation: Pixel offsets show episodic dome growth of the Colima volcano. - Journal of Geophysical Research, 118, 4, p. 1408-1419. http://doi.org/10.1002/jgrb.50066
  48. Wang, R., Parolai, S., Ge, M., Ji, M., Walter, T. R., Zschau, J. (2013): The 2011 Mw 9.0 Tohoku Earthquake: Comparison of GPS and Strong‐Motion Data. - Bulletin of the Seismological Society of America, 103, p. 1336-1347. http://doi.org/10.1785/0120110264
  49. Ruch, J., Warren, J. K., Risacher, F., Walter, T. R., Lanari, R. (2012): Salt lake deformation detected from space. - Earth and Planetary Science Letters, 331-332, p. 120-127. http://doi.org/10.1016/j.epsl.2012.03.009
  50. Shirzaei, M., Bürgmann, R., Oncken, O., Walter, T. R., Victor, P., Ewiak, O. (2012): Response of forearc crustal faults to the megathrust earthquake cycle: InSAR evidence from Mejillones Peninsula, Northern Chile. - Earth and Planetary Science Letters, 333-334, p. 157-164. http://doi.org/10.1016/j.epsl.2012.04.001
  51. Bathke, H., Shirzaei, M., Walter, T. R. (2011): Inflation and deflation at the steep-sided Llaima stratovolcano (Chile) detected by using InSAR. - Geophysical Research Letters, 38, L10304. http://doi.org/10.1029/2011GL047168
  52. Carracedo, J. C., Fernandez-Turiel, J. L., Gimeno, D., Guillou, H., Klügel, A., Krastel, S., Paris, R., Perez-Torrado, F. J., Rodriguez-Badiola, E., Rodriguez-Gonzalez, A., Troll, V. R., Walter, T. R., 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. - Tectonophysics, 503, 3-4, p. 239-241. http://doi.org/10.1016/j.tecto.2010.10.015
  53. Walter, T. R., Ruch, J., Manconi, A., Shirzaei, M., Motagh, M., Anderssohn, J. (2011) Die "Beule" von Lazufre. System Erde, 1,1, http://doi.org/10.2312/GFZ.syserde.01.01.5
  54. Walter, T. R. (2011) Monitoring von Vulkanen. Geographische Rundschau, 63 (6), 45-51. ISSN: 0016-7460.
  55. Platz, T., Münn, S., Walter, T. R., Procter, J. N., McGuire, P. C., Dumke, A., Neukum, G. (2011): Vertical and lateral collapse of Tharsis Tholus, Mars. - Earth and Planetary Science Letters, 305, 3-4, p. 445-455. http://doi.org/10.1016/j.epsl.2011.03.012
  56. Schöpa, A., Pantaleo, M., Walter, T. R. (2011): Scale-dependent location of hydrothermal vents: Stress field models and infrared field observations. - Journal of Volcanology and Geothermal Research, 203, 3-4, p. 133-145. http://doi.org/10.1016/j.jvolgeores.2011.03.008
  57. Shirzaei, M., Walter, T. R. (2011): Estimating the Effect of Satellite Orbital Error Using Wavelet-Based Robust Regression Applied to InSAR Deformation Data. - IEEE Transactions on Geoscience and Remote Sensing, 49, 11, p. 4600-4605. http://doi.org/10.1109/TGRS.2011.2143419
  58. Shirzaei, M., Walter, T. R., Nankali, H. R., Holohan, E. (2011): Gravity-driven deformation of Damavand volcano, Iran, detected through InSAR time series. - Geological Society of America Bulletin, 39, 3, p. 251-254. http://doi.org/10.1130/G31779.1
  59. Walter, T. R. (2011): Low cost volcano deformation monitoring: optical strain measurement and application to Mount St. Helens data. - Geophysical Journal International, 186, 2, p. 699-705. http://doi.org/10.1111/j.1365-246X.2011.05051.x
  60. Walter, T. R. (2011): Structural architecture of the 1980 Mount St. Helens collapse: an analysis of the Rosenquist photo sequence using digital image correlation. - Geology, 39, 8, p. 767-770. http://doi.org/10.1130/G32198.1
  61. Burchardt, S., Walter, T. R. (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, p. 297-308. http://doi.org/10.1007/s00445-009-0321-7
  62. Manconi, A., Walter, T. R., Manzo, M., Zeni, G., Tizzani, P., Sansosti, E., Lanari, R. (2010): On the effects of 3-D mechanical heterogeneities at Campi Flegrei caldera, southern Italy. - Journal of Geophysical Research, 115, B08405. http://doi.org/10.1029/2009JB007099
  63. Motagh, M., Schurr, B., Anderssohn, J., Cailleau, B., Walter, T. R., 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, 490, 1-2, p. 66-68. http://doi.org/10.1016/j.tecto.2010.04.033
  64. Ruch, J., Walter, T. R. (2010): Relationship between the InSAR-measured uplift, the structural framework, and the present-day stress field at Lazufre volcanic area, central Andes. - Tectonophysics, 492, 1-4, p. 133-140. http://doi.org/10.1016/j.tecto.2010.06.003
  65. Shirzaei, M., Walter, T. R. (2010): Time-dependent volcano source monitoring using interferometric synthetic aperture radar time series: A combined genetic algorithm and Kalman filter approach. - Journal of Geophysical Research, 115, B10421. http://doi.org/10.1029/2010JB007476
  66. Walter, T. R., Manzo, M., Manconi, A., Solaro, G., Lanari, R., Motagh, M., Woith, H., Parolai, S., Shirzaei, M., Zschau, J., Baris, S., Ansal, A. (2010): Satellite Monitoring of Hazards: A focus on Istanbul, Turkey. - Eos, Transactions American Geophysical Union, 91, 36, p. 313-314. http://doi.org/10.1029/2010EO360001
  67. Acocella, V., Neri, M., Walter, T. R. (2009): Structural features of Panarea volcano in the frame of the Aeolian Arc (Italy): Implications for the 2002-2003 unrest. - Journal of Geodynamics, 47, 5, p. 288-292. http://doi.org/10.1016/j.jog.2009.01.004
  68. Anderssohn, J., Motagh, M., Walter, T. R., Rosenau, 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, 10, p. 2062-2075. http://doi.org/10.1016/j.rse.2009.05.004
  69. Eggert, S., Walter, T. R. (2009): Volcanic activity before and after large tectonic earthquakes: Observations and statistical significance. - Tectonophysics, 471, 1-2, p. 14-26. http://doi.org/10.1016/j.tecto.2008.10.003
  70. Wauthier, C., Oyen, A.M., Marinkovic, P.S., Cayol, V., Fernandez, J., Gonzalez, P., Hanssen, R., Kervyn, F., d'Oreye, N., Shirzaei, M., and Walter, T. R. (2009) L-Band and C-Band Insar Studies of African Volcanic Areas. 2009 Ieee International Geoscience and Remote Sensing Symposium, v 1-5, p. 461-464. http://dx.doi.org/10.1109/IGARSS.2009.5418043
  71. Le Corvec, N., Walter, T. R. (2009): Volcano spreading and fault interaction influenced by rift-zone intrusions: Insights from analogue experiments analyzed with digital image correlation. - Journal of Volcanology and Geothermal Research, 183, 3-4, p. 170-182. http://doi.org/10.1016/j.jvolgeores.2009.02.006
  72. Longpré, M.-.-A., Troll, V. R., Walter, T. R., Hansteen, T. H. (2009): Volcanic and geochemical evolution of the Teno massif, Tenerife, Canary Islands: Some repercussions of giant landslides on ocean island magmatism. - Geochemistry Geophysics Geosystems (G3), 10, Q12017. http://doi.org/10.1029/2009GC002892
  73. Manconi, A., Longpré, M.-.-A., Walter, T. R., Troll, V. R., Hansteen, T. H. (2009): The effects of flank collapses on volcano plumbing systems. - Geology, 37, 12, p. 1099-1102. http://doi.org/10.1130/G30104A.1
  74. Ruch, J., Manconi, A., Zeni, G., Solaro, G., Pepe, A., Shirzaei, M., Walter, T. R., Lanari, R. (2009): Stress transfer in the Lazufre volcanic area, Central Andes. - Geophysical Research Letters, 36, L22303. http://doi.org/10.1029/2009GL041276
  75. Shirzaei, M., Walter, T. R. (2009): Randomly iterated search and statistical competency as powerful inversion tools for deformation source modeling: Application to volcano interferometric synthetic aperture radar data. - Journal of Geophysical Research, 114, B10401. http://doi.org/10.1029/2008JB006071
  76. Walter, T. R., Wang, R., Acocella, V., Neri, M., Grosser, H., Zschau, J. (2009): Simultaneous magma and gas eruptions at three volanoes in southern Italy: an earthquake trigger? - Geology, 37, 3, p. 251-254. http://doi.org/10.1130/G25396A
  77. 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 and levelling. - Geophysical Journal International, 174, 1, p. 287-294. http://doi.org/10.1111/j.1365-246X.2008.03805.x
  78. Donoghue, E., Troll, V. R., Harris, C., O'Halloran, A., Walter, T. R., Torrado, F. J. P. (2008): Low-temperature hydrothermal alteration of intra-caldera tuffs, Miocene Tejeda caldera, Gran Canaria, Canary Islands. - Journal of Volcanology and Geothermal Research, 176, 4, p. 551-564. http://doi.org/10.1016/j.jvolgeores.2008.05.002
  79. Holohan, E., Troll, V. R., de Vries, B. V., Walsh, J. J., Walter, T. R. (2008): Unzipping Long Valley: An explanation for vent migration patterns during an elliptical ring fracture eruption. - Geology, 36, 4, p. 323-326. http://doi.org/10.1130/G24329A.1
  80. 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
  81. 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. https://doi.org/10.1016/S1871-644X(07)00009-5
  82. Motagh, M., Wang, R., Walter, T. R., 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, 3, p. 842-848. http://doi.org/10.1111/j.1365-246X.2008.03852.x
  83. Motagh, M., Walter, T. R., Sharifi, M. A., Fielding, E., Schenk, A., Anderssohn, J., Zschau, J. (2008): Land subsidence in Iran caused by widespread water reservoir overexploitation. - Geophysical Research Letters, 35, L16403. http://doi.org/10.1029/2008GL033814
  84. Ruch, J., Anderssohn, J., Walter, T. R., Motagh, M. (2008): Caldera-scale inflation of the Lazufre volcanic area, South America: Evidence from InSAR. - Journal of Volcanology and Geothermal Research, 174, 4, p. 337-344. http://doi.org/10.1016/j.jvolgeores.2008.03.009
  85. Walter, T. R., Wang, R., Lühr, 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, H., 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? - Geochemistry Geophysics Geosystems (G3), 9, Q05006. http://doi.org/10.1029/2007GC001810
  86. Amelung, F., Yun, S.-H., Walter, T. R., Segall, P., Kim, S. W. (2007): Stress control of deep rift intrusion at Mauna Loa volcano, Hawaii. - Science, 316, 5827, p. 1026-1030. http://doi.org/10.1126/science.1140035
  87. Manconi, A., Walter, T. R., Amelung, F. (2007): Effects of mechanical layering on volcano deformation. - Geophysical Journal International, 170, 2, p. 952-958. http://doi.org/10.1111/j.1365-246X.2007.03449.x
  88. 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, p. 518-526. http://doi.org/10.1111/j.1365-246X.2006.03246.x
  89. Walter, T. R. (2007): How a tectonic earthquake may wake up volcanoes: Stress transfer during the 1996 earthquake-eruption sequence at the Karymsky Volcanic Group, Kamchatka. - Earth and Planetary Science Letters, 264, 3-4, p. 347-359. http://doi.org/10.1016/j.epsl.2007.09.006
  90. Walter, T. R., Lühr, B.-G., Sobiesiak, M., Wang, R., Parolai, S., Wetzel, H.-U., Zschau, J., Milkereit, C., Günther, E., Wassermann, J., Behr, Y., Anggraini, A., Brotopuspito, K. S., Harjadi, P. (2007): Soft Volcanic Sediments Compound 2006 Java Earthquake Disaster. - Eos, Transactions American Geophysical Union, 88, 46, p. 486. http://dx.doi.org/10.1029/2007EO460002
  91. Walter, T. R., Wang, R., Zimmer, M., Ratdomopurbo, A., Grosser, H., Lühr, B.-G. (2007): Volcanic activity influenced by tectonic earthquakes: static versus dynamic stress triggering at Mt. Merapi, Indonesia. - Geophysical Research Letters, 34, L05304. http://doi.org/10.1029/2006GL028710
  92. Walter, T. R., Amelung, F. (2007): Volcanic eruptions following M>=9 megathrust earthquakes: Implications for the Sumatra-Andaman volcanoes. - Geology, 35, 6, p. 539-542. http://doi.org/10.1130/G23429A.1
  93. Münn, S., Walter, T. R., Klügel, A. (2006): Gravitational spreading controls rift zones and flank instability on El Hierro, Canary Islands. - Geological Magazine, 143, 3, p. 257-268. http://doi.org/10.1017/S0016756806002019
  94. Walter, T. R., Klügel, A., Münn, S. (2006): Gravitational spreading and formation of new rift zones on overlapping volcanoes. - Terra Nova, 18, 1, p. 26-33. http://doi.org/10.1111/j.1365-3121.2005.00656.x
  95. Walter, T. R., Amelung, F. (2006): Volcano-earthquake interaction at Mauna Loa, Hawaii. - Journal of Geophysical Research, 111, B05204, p. 1-17. http://doi.org/10.1029/2005JB003861
  96. Belousov, A., Walter, T. R., 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, 5, p. 457-468. http://doi.org/10.1007/s00445-004-0387-1
  97. Cailleau, B., Walter, T. R., Janle, P., Hauber, E. (2005): Unveiling the origin of radial grabens on Alba Patera volcano by finite element modeling. - Icarus, 176, 1, p. 44-56. http://doi.org/10.1016/j.icarus.2005.01.017
  98. Holohan, E., Troll, V. R., Walter, T. R., Münn, S., McDonnell, S., Shipton, Z. (2005): Elliptical calderas in active tectonic settings: an experimental approach. - Journal of Volcanology and Geothermal Research, 144, 1-4, p. 119-136. http://doi.org/10.1016/j.jvolgeores.2004.11.020
  99. Klügel, A., Walter, T. R., 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, 1, p. 37-46. http://doi.org/10.1007/s00445-005-0418-6
  100. Walter, T. R., 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, B10, B10205. http://doi.org/10.1029/2005JB003688
  101. Walter, T. R., Troll, V., Cailleau, B., Belousov, A., Schmincke, H. U., Bogaard, P., Amelung, F. (2005): Rift zone reorganization through flank instability on ocean island volcanoes: Tenerife, Canary Islands. - Bulletin of Volcanology, 67, 4, p. 281-291. http://doi.org/10.1007/s00445-004-0352-z
  102. Walter, T. R., Amelung, F. (2004): Influence of volcanic activity at Mauna Loa, Hawaii, on earthquake occurrence in the Kaoiki Seismic Zone. - Geophysical Research Letters, 31, L07622. http://doi.org/10.1029/2003GL019131
  103. Cailleau, B., Walter, T. R., 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, 5141. http://doi.org/10.1029/2003JE002135
  104. Walter, T. R., Troll, V. (2003): Experiments on rift zone formation near unstable flanks in volcanic edifices. - Journal of Volcanology and Geothermal Research, 127, 1-2, p. 107-120. http://doi.org/10.1016/S0377-0273(03)00181-1
  105. Grujic, D., Walter, T. R., Gärtner, H. (2002): Shape and structure of (analogue models of) refolded layers. - Journal of Structural Geology, 24, 8, p. 1313-1326. http://doi.org/10.1016/S0191-8141(01)00134-1
  106. Troll, V., Walter, T. R., Schmincke, H. U. (2002): Cyclic caldera collapse: piston or piecemeal subsidence? Field and experimental evidence. - Geology, 30, 2, p. 135-138. http://doi.org/10.1130/0091-7613(2002)030<0135:CCCPOP>2.0.CO;2
  107. Walter, T. R., Schmincke, H. U. (2002): Rifting, recurrent landsliding and Miocene structural reorganization on NW-Tenerife (Canary Islands). - International Journal of Earth Sciences, 91, 4, p. 615-628. http://doi.org/10.1007/s00531-001-0245-8
  108. Walter, T. R., Troll, V. (2001): Formation of caldera periphery faults, an experimental study. - Bulletin of Volcanology, 63, 2-3, p. 191-203. http://doi.org/10.1007/s004450100135
Mobirise

Public television

There are a number of tv-documentaries. Check this out for instance: Java in Jeopardy - Exploring the Volcano. 52' (GER, ENG, FRE). See also science award nominee short video.

Mobirise

Very early career

Children textbooks, mostly in german language.
This is one of my favorite. See here if you want to buy.

Mobirise

News Volcano expert

Whenever volcano hazards strike, print and multi media are welcome for distributing our scientific knowledge and information. Learn more...

CONTACT FORM

Interested in conducting a research project? Interested in a PhD or MSc thesis advise or supervision? Use the contact form or send me an email.

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Section 2.1.: Physics of Earthquakes and Volcanoes,
GFZ German Research Centre for Geosciences,
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