Dr. Matthias Ohrnberger

General Geophysics

Scientific Staff

Campus Golm
Building 27, Room 1.37

Karl-Liebknecht-Str. 24-25
14476 Potsdam-Golm

CV

Research

Teaching

Publications

Sudibyo, M. R. P., Eibl, E. P. S., Hainzl, S., and Ohrnberger, M. (2024), Dynamical changes in seismic properties prior to, during, and after the 2014–2015 Holuhraun eruption, Iceland, Nat. Hazards Earth Syst. Sci., 24, 4075–4089, doi.org/10.5194/nhess-24-4075-2024

Rein, N., Isken, M.P., Domigall, D., Ohrnberger, M., Hannemann, K., Krüger, F., Korn, M., et al. Dahm, T. (2024) Characterizing shallow fault zones by integrating profile, borehole and array measurements of seismic data and distributed acoustic sensing. Near Surface Geophysics, 00, 1–15. https://doi.org/10.1002/nsg.12293

Pilz M, Roux P, Mohammed SA, Garcia RF, Steinmann R, Aubert C, Bernauer F, Guéguen P, Ohrnberger M, and Cotton F (2024). Wind turbines as a metamaterial-like urban layer: an experimental investigation using a dense seismic array and complementary sensing technologies. Front. Earth Sci. 12:1352027. doi: 10.3389/feart.2024.1352027

Zali, Z., Mousavi, S.M., Ohrnberger, M., Eibl, E.P.S., and F. Cotton (2024). Tremor clustering reveals pre-eruptive signals and evolution of the 2021 Geldingadalir eruption of the Fagradalsfjall Fires, Iceland. Commun Earth Environ5, 1 (2024). doi.org/10.1038/s43247-023-01166-w

Lukas Lehmann, Matthias Ohrnberger, Malte Metz, Sebastian Heimann (2023). Accelerating low-frequency ground motion simulation for finite fault sources using neural networks, Geophysical Journal International, Volume 234, Issue 3, September 2023, Pages 2328–2342, https://doi.org/10.1093/gji/ggad239

Zali, Z., Rein, T., Krüger, F., Ohrnberger, M., and Scherbaum, F. (2023): Ocean bottom seismometer (OBS) noise reduction from horizontal and vertical components using harmonic–percussive separation algorithms, Solid Earth, 14, 181–195, doi.org/10.5194/se-14-181-2023

Reza D. D. Esfahani, Fabrice Cotton, Matthias Ohrnberger, Frank Scherbaum (2022); TFCGAN: Nonstationary Ground‐Motion Simulation in the Time–Frequency Domain Using Conditional Generative Adversarial Network (CGAN) and Phase Retrieval Methods. Bulletin of the Seismological Society of America 2022; 113 (1): 453–467. doi: https://doi.org/10.1785/0120220068

Fischer, T., Hrubcova, P., Dahm, T., Woith, H., Vylita, T., Ohrnberger, M., Vlcek, J., Horalek, J., Dedecek, P., Zimmer, M., Lipus, M.P., Pierdominici, S., Kallmeyer, J., Krüger, F., Hannemann, K., Korn, M., Kämpf, H., Reinsch, Th., Klicpera, J., Vollmer, D., and Daskalopoulou, K., 2022, ICDP drilling of the Eger Rift observatory: magmatic fluids driving the earthquake swarms and deep biosphere, Sci. Dril., 31, 31–49, 2022, https://doi.org/10.5194/sd-31-31-2022

Bérénice Froment, Andrés Olivar‐Castaño, Matthias Ohrnberger, Loic Gisselbrecht, Katrin Hannemann, Edward Marc Cushing, Pierre Boué, Céline Gélis, Annabel Haendel, Marco Pilz, Laura Hillmann, Occitane Barbaux, Sophie Beauprêtre, Gilbert Bouzat, Emmanuel Chaljub, Fabrice Cotton, François Lavoué, Laurent Stehly, Chuanbin Zhu, Olivier Magnin, Laurent Métral, Aurélien Mordret, Yann Richet, Alexandre Tourette (2022); Complementary Dense Datasets Acquired in a Low‐to‐Moderate Seismicity Area for Characterizing Site Effects: Application in the French Rhône Valley. Seismological Research Letters; doi: https://doi.org/10.1785/0220220244

Marios Anthymidis, Costas Papazachos, Matthias Ohrnberger, Alexandros Savvaidis, Nikos Theodoulidis, Dimitris Oikonomou (2022). Evaluation of the 3D Near‐Surface Velocity Structure in an Urban Environment from Ambient Noise Array Tomography: The Case of the City of Thessaloniki (Northern Greece). Bulletin of the Seismological Society of America; doi: https://doi.org/10.1785/0120220004

Steinberg, A., Vasyura-Bathke, H., Gaebler, P., Ohrnberger, M., & Ceranna, L. (2021). Estimation of seismic moment tensors using variational inference machine learning. Journal of Geophysical Research: Solid Earth, 126, e2021JB022685. https://doi.org/10.1029/2021JB022685

Zahra Zali, Matthias Ohrnberger, Frank Scherbaum, Fabrice Cotton, Eva P. S. Eibl (2021). Volcanic Tremor Extraction and Earthquake Detection Using Music Information Retrieval Algorithms. Seismological Research Letters, doi: 10.1785/0220210016

Julie Albaric, Daniela Kühn, Matthias Ohrnberger, Nadège Langet, Dave Harris, Ulrich Polom, Isabelle Lecomte, Gregor Hillers (2021). Seismic Monitoring of Permafrost in Svalbard, Arctic Norway. Seismological Research Letters, doi: 10.1785/0220200470

Dokht Dolatabadi Esfahani, R., K. Vogel, F. Cotton, M. Ohrnberger, F. Scherbaum, and M. Kriegerowski (2021). Exploring the Dimensionality of Ground-Motion Data by Applying Autoencoder Techniques, Bull.Seismol. Soc. Am. 111, 1563-1576, doi:10.1785/0120200285

Dokht Dolatabadi, R., Gholami, A., and Ohrnberger, M. (2020). An inexact augmented Lagrangian method for nonlinear dispersion curve inversion using Dix-type global linear approximation. Geophysics. 85. 1-38. doi:10.1190/geo2019-0717.1.

Forbriger, T., Gao, L., Malischewsky, P., Ohrnberger, M., and Y. Pan (2020). A single Rayleigh mode may exist with multiple values of phase-velocity at one frequency, Geophysical Journal International, Volume 222, Issue 1, July 2020, Pages 582–594, doi: 10.1093/gji/ggaa123

Wathelet, M., J.-L. Chatelain, C. Cornou, G. D. Giulio, B. Guillier, M. Ohrnberger, and A. Savvaidis (2020). Geopsy: A User-Friendly Open-Source Tool Set for Ambient Vibration Processing, Seismol. Res. Lett. XX, 1–12, doi: 10.1785/0220190360.

Lontsi, A. M., García-Jerez, A., Molina-Villegas, J. C., Sánchez-Sesma, F. J., Molkenthin, C., Ohrnberger, M., Krüger, F., Wang, R. and Fäh, D. (2019). A generalized theory for full microtremor horizontal-to-vertical [H/V(z, f)] spectral ratio interpretation in offshore and onshore environments, Geophysical Journal International, 218(2), 1276–1297. doi: 10.1093/gji/ggz223

Kriegerowski, M., Cesca, S., Ohrnberger, M., Dahm, T., and F. Krüger, 2019. Event couple spectral ratio Q method for earthquake clusters: application to North-West Bohemia, Solid Earth, 10, 317–328. DOI: 10.5194/se-10-317-2019

Kriegerowski, M., Petersen, G.M., Vasyura‐Bathke, H., and M. Ohrnberger (2019). A Deep Convolutional Neural Network for Localization of Clustered Earthquakes Based on Multistation Full Waveforms. Seismological Research Letters, 90 (2A): 510–516. DOI: 10.1785/0220180320

Haendel, A., Ohrnberger, M., and F. Krueger (2018). Frequency-dependent quality factors from the deconvolution of ambient noise recordings in a borehole in West Bohemia/Vogtland, Geophys. J. Int., 216, pp. 251-260, DOI: 10.1093/gji/ggy422.

M. Wathelet, B. Guillier, P. Roux, C. cornou, and M. Ohrnberger (2018). Rayleigh wave three-component beamforming: signed ellipticity assessment from high-resolution frequency-wavenumber processing of ambient vibration arrays, Geophys. J. Int., DOI: 10.1093/gji/ggy286.

Foti S, Hollender F, Garofalo F, Albarello D, Asten M, Bard PY, Comina C, Cornou C, Cox BR, Di Giulio G, Forbriger T, Hayashi K, Lunedei E, Martin A, Mercerat D, Ohrnberger M, Poggi V, Renalier F, Sicilia D, Socco LV (2017) Guidelines for the good practice of surface wave analysis—a product of the InterPACIFIC project. Bulletin of Earthqauke Engineering, DOI: 10.1007/s10518-017-0206-7, published online 04.09.2017.

Hammer, C., Fäh, D., and M. Ohrnberger, 2016. Automatic detection of wet-snow avalanche seismic signals, Nat. Hazards, published online: 19.12.2016, doi: 10.1007/s11069-016-2707-0

Lontsi, A.M., Ohrnberger, M., and F. Krüger, 2016. Shear wave velocity profile estimation by integrated analysis of active and passive seismic data from small aperture arrays, Journal of Applied Geophysics, 130, 37-52. doi: 10.1016/j.jappgeo.2016.03.034

Tuan, T.T., Vinh, P.C., Ohrnberger, M., Malischewsky, P., and A. Aoudia, 2016. An Improved Formula of Fundamental Resonance Frequency of a Layered Half-Space Model Used in H/V Ratio Technique, Pure and Applied Geophysics, 173(8), 2803–2812. doi: 10.1007/s00024-016-1313-0

F. Garofalo, S. Foti, F. Hollender, P.Y. Bard, C. Cornou, B.R. Cox, M. Ohrnberger, D. Sicilia, M. Asten, G. Di Giulio, T. Forbriger, B. Guillier, K. Hayashi, A. Martin, S. Matsushima, D. Mercerat, V. Poggi, H. Yamanaka, 2016. InterPACIFIC project: Comparison of invasive and non-invasive methods for seismic site characterization. Part I: Intra-comparison of surface wave methods, Soil Dynamics and Eathquake Engineering, 82, 222-240. doi: 10.1016/j.soildyn.2015.12.010

F. Garofalo, S. Foti, F. Hollender, P.Y. Bard, C. Cornou, B.R. Cox, A. Dechamp, M. Ohrnberger, D. Sicilia, D. Teague, C. Vergniault, 2016. InterPACIFIC project: Comparison of invasive and non-invasive methods for seismic site characterization. Part II: inter-comprison between surface-wave and borehole methods, Soil Dynamics and Earthquake Engineering, 82, 241-254, doi: 10.1016/j.soildyn.2015.12.009

Braun, T., T. Dahm, F. Krüger, and M. Ohrnberger, 2016. Does geothermal exploitation trigger earthquakes in Tuscany?, Eos, 97, doi:10.1029/2016EO053197. Published on 31 May 2016.

Knapmeyer-Endrun, B., Golombek, M.P., and M. Ohrnberger, 2016. Rayleigh Wave Ellipticity Modeling and Inversion for Shallow Structure at the Proposed InSight Landing Site in Elysium Planitia, Mars, Space Sience Review, doi: 10.1007/s11214-016-0300-1

Lontsi, A.M., Ohrnberger, M., Krüger, F., and F.J. Sánchez-Sesma, 2016. Combining surface-wave phase-velocity dispersion curves and full microtremor horizontal-to-vertical spectral ratio for subsurface sedimentary site characterization, Interpretation, November 2016, Vol. 4, No. 4,SQ41-SQ49

Haendel, A., Ohrnberger, M., Krüger, F., 2016. Extracting near-surface QL between 1-4 Hz from higher-order noise correlations in the Euroseistest area, Greece, Geophysical Journal International, 207, 655-666, doi: 10.1093/gji/ggw295.

Overduin, P. P., C. Haberland, T. Ryberg, F. Kneier, T. Jacobi, M. N. Grigoriev, and M. Ohrnberger (2015), Submarine permafrost depth from ambient seismic noise, Geophys. Res. Lett., 42, DOI: 10.1002/2015GL065409.

Agostiny Marrios Lontsi, A.M., Sánchez-Sesma, F.J., Molina-Villegas, J.C., Ohrnberger, M., and Kr"uger, F., 2015. Full microtremor H/V(z, f) inversion for shallow subsurface characterization, Geophysical Journal International, (July, 2015) 202 (1): 298-312, DOI: 10.1093/gji/ggv132.

Hammer, C., Ohrnberger, M., and Schlindwein, V., 2015. Pattern of cryospheric seismic events observed at Ekström ice shelf, Antarctica, Geophysical Research Letters, 42, DOI: 10.1002/2015GL064029.

Hannemann, K., Papazachos, C., Ohrnberger, M., Savvaidis, A., Anthymidis, M. and Lontsi, A.M. (2014). Three-dimensional shallow structure from high-frequency ambient noise tomography: New results for the Mygdonia basin-Euroseistest area, northern Greece. Journal of Geophysical Research: Solid Earth, Article first published online: 13 JUN 2014. DOI: 10.1002/2013JB010914.

T. Dahm, D. Becker, M. Bischoff, S. Cesca, B. Dost, R. Fritschen, S. Hainzl, C. D. Klose, D. Kühn, S. Lasocki, Th. Meier, M. Ohrnberger, E. Rivalta, U. Wegler, S. Husen, 2013. Recommendation for the discrimination of human-related and natural seismicity, LETTER TO THE GUEST EDITORS, Journal of Seismology, 17, 197-202, DOI: 10.1007/s10950-012-9295-6.

Hammer, C., Ohrnberger, M., and Fäh, D., 2013. Classifying seismic waveforms from scratch: a case study in the alpine enviro

Hobiger, M., Cornou, C., Wathelet, M., Di Giulio, G., Knapmeyer-Endrun, B., Renalier, F., Bard, P.-Y., Savvaidis, A., Hailemikael, S., Bihan Le, N., Ohrnberger, M., and N. Theodoulidis, 2012. Ground structure imaging by inversions of Rayleigh wave ellipticity: sensitivity analysis and application to European strong-motion sites, Geophysical Journal International; DOI: 10.1093/gji/ggs005

Riggelsen, C., and M. Ohrnberger, 2012. A Machine Learning Approach for Improving the Detection Capabilities at 3C Seismic Stations, Pure and Applied Geophysics, PAGEOPH, special issue: Recent Advances in Nuclear Explosion Monitoring; DOI: 10.1007/s00024-012-0592-3

Hammer, C., Ohrnberger, M., and D. Faeh, 2012. Classifying seismic waveforms from scratch: a case study in the alpine environment, Geophysical Journal International; DOI: 10.1093/gji/ggs036

Hammer, C., Beyreuther, M., and M. Ohrnberger, 2012. A Seismic‐Event Spotting System for Volcano Fast‐Response Systems, Bulletin of the Seismological Society of America, June 2012, 102, 948-960; DOI: 10.1785/0120110167

Di Giulio, G., Savvaidis, A., Ohrnberger, M., Wathelet, M., Cornou, C., Knapmeyer-Endrun, B., Renalier, F., Theodoulidis, N., and Bard, P.-Y., 2012. Exploring the model space and ranking a best class of models in surface-wave dispersion inversion: Application at European strong-motion sites, Geophysics, 77, B147, 2012; DOI: 10.1190/geo2011-0116.1

Hammer, C., and M. Ohrnberger, 2012. Forecasting seismo-volcanic activity by using the dynamical behavior of volcanic earthquake rates, Journal of Volcanology and Geothermal Research, online February 8th, 2012; DOI: 10.1016/j.jvolgeores.2012.01.016

Blaser, L., Ohrnberger, M., Krüger, F., and F. Scherbaum, 2012. Probabilistic tsunami threat assessment of 10 recent earthquakes offshore Sumatra, Geophysical Journal International, 188(3), 1273--1284; DOI: 10.1111/j.1365-246X.2011.05324.x

Beyreuther, M., Hammer, C., Wassermann, J., Ohrnberger, M., and T. Megies, 2012. Constructing a Hidden Markov Model based earthquake detector: application to induced seismicity, Geophysical Journal International; DOI: 10.1111/j.1365-246X.2012.05361.x

Kühn, D., Ohrnberger, M., and T. Dahm, 2011, Imaging a shallow salt diapir using ambient seismic vibrations beneath the densely built-up city area of Hamburg, Northern Germany, Journal of Seismology, 15, 507-531, DOI: 10.1111/10.1007/s10950-011-9234-y

Blaser, L., Ohrnberger, M., Riggelsen, C., Babeyko, A. and Scherbaum, F., 2011, Bayesian Networks for Tsunami Early Warning, Geophysical Journal International, 185(3), 1431-1443, DOI: 10.1111/j.1365-246X.2011.05020.x

Blaser, L., Krüger, F., Ohrnberger, M., and F. Scherbaum, 2010: Scaling relations of earthquake source parameter estimates with special focus on subduction environment, BSSA, 100(6), pp. 2912-2926. (doi:10.1785/0120100111)

Köhler, A., Ohrnberger, M., and F. Scherbaum, 2010: Unsupervised Pattern Recognition in Continuous Seismic Wavefield Records using Self-Organizing Maps, GJI, 182, pp. 1619-1630. (doi: 10.1111/j.1365-246X.2010.04709.x)

Cristiano, L., Petrosino, S., Saccorotti, G., Ohrnberger, M., and R. Scarpa, 2010: Shear-wave velocity structure at Mt. Etna from inversion of Rayleigh-wave dispersion patterns (2 s < T < 20 s), ANNALS OF GEOPHYSICS, 53, 2, APRIL 2010; doi: 10.4401/ag-4574.

Scherbaum, F., Kühn, N., Ohrnberger, M., and a. Köhler, 2010: Exploring the Proximity of Ground-Motion Models Using High-Dimensional Visualization Techniques, Earthquake Spectra, 26(4), pp. 1117–1138.

Roessler, d., Krueger, f., Ohrnberger, M., and L. Ehlert, 2010: Rapid characterisation of large earthquakes by multiple seismic broadband arrays, Nat. Hazards Earth Syst. Sci., 10, 923-932, 2010. direct link, doi:10.5194/nhess-10-923-2010.

Dahm, T., Kühn, D., Ohrnberger, M., Kröger, J., Wiederhold, H., Reuther, C.-D., Dehghani, A. and F. Scherbaum, 2010: Combining geophysical data sets to study the dynamics of shallow evaporites in urban environments: application to Hamburg, Germany, Geophysical Journal International, Volume 181, Issue 1, Pages 154 - 172, Published Online: 22 Feb 2010 direct link.

Endrun, B., Ohrnberger, M., and A. Savvaidis, 2009: On the repeatability and consistency of three-component ambient vibration array measurements, Bull. Earthquake Eng., doi: 10.1007/s10518-009-9159-9,

Blaser, L., Ohrnberger, M., Riggelsen, C. and F. Scherbaum, 2009: Bayesian Belief Network for Tsunami Warning Decision Support, in: C. Sossai and G. Chemello (Eds.): ECSQARU 2009, LNAI 5590, pp. 757 -- 768, 2009. (link to article)

Köhler, A. Ohrnberger, M., and F. Scherbaum, 2009: Unsupervised feature selection and general pattern discovery using Self-Organizing Maps for gaining insights into the nature of seismic wavefields, Computers and Geosciences (2009), doi:10.1016/j.cageo.2009.02.004.

Tuan, T.T., Malischewsky, P.G., Scherbaum, F. and M. Ohrnberger, 2008: Dispersion of zero-frequency Rayleigh waves in an isotropic model 'Layer over half-space' Geophysical Journal International, 175(2), pp. 537-540, doi:10.1111/j.1365-246X.2008.03917.x.

Köhler, A., Ohrnberger, M., Riggelsen, C. and F. Scherbaum, 2008: Unsupervised Feature Selection for Pattern Discovery in Seismic Wavefields, FSDM Workshop, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKKD), 15-19 September 2008, Antwerp, Belgium.

Kulesh, M. Holschneider, M., Ohrnberger, M., and E. Lück, 2008: Modeling of Wave Dispersion Using Continuous Wavelet Transforms II: Wavelet Based Frequency-Velocity Analysis, Pure appl. geophys., 165, 255-270, 2008.

Wathelet, M., Jongmans, D., Ohrnberger, M., and Bonnefoy-Claudet, S. (2008). Array performances for ambient vibrations on a shallow structure and consequences over VS inversion, Journal of Seismology, 12, 1-19, 2008.

Guillier, B., Atakan, K., Chatelain, J.-L., Havskov, J., Ohrnberger, M., Cara, F., Duval, A.-M., Zacharopoulos, S., Teves-Costa, P., and the SESAME Team (2008). Influence of instruments on the H/V spectral ratios of ambient vibrations, Bulletin of Earthquake Engineering, Vol 6, No. 1, 3-31, 2008.

Riggelsen, C., Ohrnberger, M., Scherbaum, F. (2007). Dynamic Bayesian Networks for Real-Time Classification of Seismic Signals, J.N. Kok et al. (Eds.): PKDD 2007, LNAI 4702, pp. 565-572, 2007. Springer-Verlag Berlin Heidelberg 2007.

Kulesh, M., Diallo, M., Holschneider, M., Kurennaya, K., Krüger, F., Ohrnberger, M.,, and Scherbaum, F. (2007). Polarization Analysis in Wavelet Domain Based on the Adaptive Covariance Method, Geophysical Journal International, 170 (2), 667-678, doi:10.1111/j.1365-246X.2007.03417.x

Reuther, C.-D., Burmann, N., Kühn, D., Ohrnberger, M.,, Dahm, T., and Scherbaum, F., 2007: Erkundung des unterirdischen Raumes der Metropolregion Hamburg: Das Projekt HADU (Hamburg - A Dynamic Underground) Geotechnik 30/1: 11-20.

Köhler, A., Ohrnberger, M., Scherbaum, F., Wathelet, M., and Cornou, C. (2007). Assessing the reliability of the modified three-component spatial autocorrelation technique, Geophysical Journal International 168 (2), 779-796. doi:10.1111/j.1365-246X.2006.03253.x

Alasonati, P., Wassermann J., and Ohrnberger, M.,, 2006: Signal classification by wavelet-based hidden Markov models: application to seismic signals of volcanic origin, in: H.M. Mader, S.G. Coles, C.B. Connor and L.J. Connor (eds.), Statistics in Volcanology, Special Publications of IAVCEI, 1, Geological Society, London, 161-174.

G. Di Giulio, C. Cornou, M. Ohrnberger, M. Wathelet, A. Rovelli, 2006: Deriving Wavefield Characteristics and Shear-Velocity Profiles from Two-dimensional Small-Aperture Arrays Analysis of Ambient Vibrations in a Small-Size Alluvial Basin, Colfiorito, Italy, BSSA, Vol. 96, No. 5, pp. 1915-1933, October 2006, doi:10.1785/0120060119.

Krüger, F. and Ohrnberger, M., 2005: Spatio-temporal source characteristics of the 26 December 2004 Sumatra earthquake as imaged by teleseismic broadband arrays, Geophys. Res. Lett., Vol. 32, No. 24, L24312, doi:10.1029/2005GL023939. view abstract

M. Holschneider, M. S. Diallo, M. Kulesh, M. Ohrnberger, E. Lück, F. Scherbaum, 2005: Characterization of dispersive surface waves using continuous wavelet transforms, Geophys. J. Int., 163(2), 463-478, doi:10.1111/j.1365-246X.2005.02787.x. view abstract

M. Wathelet, D. Jongmans, M. Ohrnberger, 2005: Direct inversion of spatial auto-correlation with the neighbourhood algorithm, Bull. Seism. Soc. Am., 95(5), 1787-1800. (view abstract)

Krüger F. and Ohrnberger, M., 2005: Tracking the rupture of the Mw = 9.3 Sumatra earthquake over 1,150 km at teleseismic distance, Nature 435, 937-939 (16 June 2005). (doi: 10.1038/nature03696).

Köhler A., Ohrnberger, M., Scherbaum, F., Stange, S., and Kind, F., 2004: Ambient vibration measurements in the southern Rhine Graben close to Basle, Annals of Geophysics, 47(6), pp. 1771-1781.

Wathelet, M., Jongmans, D., and Ohrnberger, M., 2004: Surface wave inversion using a direct search algorithm and its application to ambient vibration measurements, Near Surface Geophysics, 2, pp. 211-221.

M. Ohrnberger, F. Scherbaum, F. Krüger, R. Pelzing and Sh.-K. Reamer, 2004: How good are shear wave velocity models obtained from inversion of ambient vibrations in the Lower Rhine Embayment (NW-Germany), Boll. Geof. Teor. Appl., 45(3), pp. 215-232.

G. Richter, J. Wassermann, M. Zimmer, and M. Ohrnberger, 2004: Correlation of seismic activity and fumarole temperature at the Mt. Merapi volcano (Indonesia) in 2000, J. Volcanol. Geotherm. Res., 135, pp. 331-342.

F. Scherbaum, K.-G. Hinzen and M. Ohrnberger, 2003: Determination of shallow shear wave velocity profiles in the Cologne, Germany area using ambient vibrations, Geophys. J. Int., 152, 597-612.

J. Wassermann and M. Ohrnberger, 2001: Automatic hypocenter determination of volcano induced seismic transients based on wavefield coherence - an application to the 1998 eruption of Mt. Merapi, Indonesia, J. Volcanol. Geotherm. Res., 110, 57-77.