TRANSTEQ - Modeling and Understanding Transient Earthquake Deformation
Final Report Abstract
Our main scientific goal was to provide insights into the interaction mode of earthquakes and transient deformation. In doing so, we will analyze and simulate the kinematics of spatialtemporal changes of deformation related to the Iquique earthquake. These included (1) Processing of GPS and InSAR time series of surface deformation in the pre- and postseismic phases, (2) Detection of low magnitude transient deformation signals, (3) Numerical modeling of subduction zone mechanisms that are responsible for the observed transient deformation field during the interseismic, coseismic and early postseismic periods. The main achievements of the project are demonstrated by a large number of high-impact publications, the acquisition of data that are freely accessible, and the development of young scientists.
Publications
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2016. Separating rapid relocking, afterslip, and viscoelastic relaxation: An application of the postseismic straightening method to the Maule 2010 cGPS. Journal of Geophysical Research: Solid Earth, 121(10), pp.7618-7638
Bedford, J., Moreno, M., Li, S., Oncken, O., Baez, J.C., Bevis, M., Heidbach, O. and Lange, D.
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2017. The super-interseismic phase of the megathrust earthquake cycle in Chile. Geophysical Research Letters, 44(2), pp.784-791
Melnick, D., Moreno, M., Quinteros, J., Baez, J.C., Deng, Z., Li, S. and Oncken, O.
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2018. Back to full interseismic plate locking decades after the giant 1960 Chile earthquake. Nature communications, 9(1), pp.1-10
Melnick, D., Li, S., Moreno, M., Cisternas, M., Jara-Muñoz, J., Wesson, R., Nelson, A., Báez, J.C. and Deng, Z.
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2018. Characterizing afterslip and ground displacement rate increase following the 2014 Iquique-Pisagua Mw 8.1 earthquake, Northern Chile. Journal of Geophysical Research: Solid Earth, 123(5), pp.4171-4192
Hoffmann, F., Metzger, S., Moreno, M., Deng, Z., Sippl, C., Ortega-Culaciati, F. and Oncken, O.
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2018. Chilean megathrust earthquake recurrence linked to frictional contrast at depth. Nature Geoscience, 11(4), pp.285-290
Moreno, M., Li, S., Melnick, D., Bedford, J.R., Baez, J.C., Motagh, M., Metzger, S., Vajedian, S., Sippl, C., Gutknecht, B.D. and Contreras-Reyes, E.
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2018. Greedy automatic signal decomposition and its application to daily GPS time series. Journal of Geophysical Research: Solid Earth, 123(8), pp.6992-7003
Bedford, J. and Bevis, M.
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2018. Spatiotemporal variation of mantle viscosity and the presence of cratonic mantle inferred from 8 years of postseismic deformation following the 2010 Maule, Chile, earthquake. Geochemistry, Geophysics, Geosystems, 19(9), pp.3272-3285
Li, S., Bedford, J., Moreno, M., Barnhart, W.D., Rosenau, M. and Oncken, O.
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2019. Machine learning can predict the timing and size of analog earthquakes. Geophysical Research Letters, 46(3), pp.1303-1311
Corbi, F., Sandri, L., Bedford, J., Funiciello, F., Brizzi, S., Rosenau, M. and Lallemand, S.
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2019. Role of lower crust in the postseismic deformation of the 2010 Maule earthquake: Insights from a model with power-law rheology. Pure and Applied Geophysics, 176(9), pp.3913-3928
Peña, C., Heidbach, O., Moreno, M., Bedford, J., Ziegler, M., Tassara, A. and Oncken, O.
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2020. Months-long thousand-kilometre-scale wobbling before great subduction earthquakes. Nature, 580(7805), pp.628-635
Bedford, J.R., Moreno, M., Deng, Z., Oncken, O., Schurr, B., John, T., Báez, J.C. and Bevis, M.
