Seismic and aseismic deformation processes associated with the 2010 Maule earthquake
Final Report Abstract
We consider that our project in the Bündelantrag was a resounding success. We have successfully combined the GPS and seismic data to glean new insights about the mechanical behavior of the plate interface and we have developed new methods for assessing the importance of seismic and aseismic deformation in periods before and after the mainshock. We have been able to make strides in our understanding of the plate interface frictional heterogeneity, as well as being able to adapt the state of the art methods for improving the determination of the patterns of motion and locking on the plate interface. Our field campaigns have ensured that the exceptional database of GPS measurements that were available for our modeling efforts will be available and enhanced for future studies. The increase in the resolving power of plate interface behavior due to densification of the field measurements is revealing some very important spatial and temporal relationships, and we believe that the success of this project should encourage the community to embark on similar projects in the future. With the increase in available data comes the issues of timely processing - something that could have been improved if we had been able to allocate a funds to pay for such a position.
Publications
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(2012): Darwin seismic gap closed by the 2010 Maule earthquake. Andean Geology 39, 558-563
Melnick, D., Moreno, M., Cisternas, M., Tassara, A.
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(2012): Toward understanding tectonic control on the Mw 8.8 2010 Maule Chile earthquake. Earth and Planetary Science Letters, 321-322, 152-16
Moreno, M.; Melnick, D.; Rosenau, M.; Baez, J.; Klotz, J.; Oncken, O.; Tassara, A.; Chen, J.; Bataille, K.; Bevis, M.; Socquet, A.; Bolte, J.; Vigny, C.; Brooks, B.; Rider, I.; Grund, V.; Smalley, B.; Carrizo, D.; Bartsch, M.; Hase, H.
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(2013): A highresolution, time-variable afterslip model for the 2010 Maule Mw = 8.8, Chile megathrust earthquake. - Earth and Planetary Science Letters, 383, 26-36
Bedford, J., Moreno, M., Baez, J. C., Lange, D., Tilmann, F., Rosenau, M., Heidbach, O., Oncken, O., Bartsch, M., Rietbrock, A., Tassara, A., Bevis, M., Vigny, C.
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(2014), Comparison of postseismic afterslip models with aftershock seismicity for three subduction-zone earthquakes: Nias 2005, Maule 2010 and Tohoku 2011, Geophys. J. Int.
D. Lange, J. C. Bedford, M. Moreno, F. Tilmann, J. C. Baez, M. Bevis and F. Krüger
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(2014), Locking of the Chile subduction zone controlled by fluid pressure before the 2010 earthquake, Nature Geoscience
Moreno, M., Haberland, C., Oncken, O., Rietbrock, A., Angiboust, S. and Heidbach, O.
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(2014), Splay fault trigger- ing by great subduction earthquakes inferred from finite element models, Geophys. Res. Lett., 41
Li, S., M. Moreno, M. Rosenau, D. Melnick, and O. Oncken
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(2015), Investigating the final seismic swarm before the Iquique-Pisagua 2014 Mw 8.1 by comparison of continuous GPS and seismic foreshock data, Geophys. Res. Lett., 42
Bedford, J., M. Moreno, B. Schurr, M. Bartsch, and O. Oncken
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(2015), Revisiting viscoelastic effects on interseismic deformation and locking degree: a case study of the Peru -North Chile subduction zone, J. Geophys. Res. Solid Earth, 120
Li, S., M. Moreno, J. Bedford, M. Rosenau, and O. Oncken
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(2015), Vertical Deformation Through a Complete Seismic Cycle at Isla Santa María, Chile. Nature Geoscience volume 8, pages 547–551
Wesson, R., Melnick, D., Cisternas, M., Moreno, M., Ely, L.
