Project 1: Structure and Seismicity

This project will create a catalogue of the aftershock series located by the temporary network stations and determine high-resolution relative locations using waveform cross-correlation methods. Arrival times of these events will be combined with existing data from previous Chilean seismic networks to invert for a high-resolution 3D velocity model. This project will also look at the first-order spatio-temporal distribution of seismicity, examine seismic active faults in the overriding plate, and determine focal mechanisms for earthquakes at the plate interface and in the overriding crust.

Contact:

Dietrich Lange: dietrich.lange (at) uni-potsdam.de

Figure 1: Map showing the aftershocks of the Mw=8.8 earthquake of 27 February 2010 (NEIC > 4.5, Global CMT solutions, Mw> 6.5). Focal mechanisms indicate shallow thrust faults, except the normal faulting Mw=6.9 aftershock near the city of Pichilemu and its pronounced crustal aftershock activity. Rupture zones of previous large and great earthquakes shown with black lines (1835, 1928 and 1939 events from CAMPOS et al. (2002); 1960 earthquake from (BARRIENTOS & WARD, 1990); 1971 earthquake from BARRIENTOS (1995); 1985 event from BARRIENTOS (1988)).

Aktuelles

Neueste Veröffentlichung:

Lange, D., Tilmann, F., Barrientos, S. E., Contreras-Reyes, E., Methe, P., Moreno, M., Heit, B., Agurto, H., Bernard, P., Vilotte, J.-P., Beck, S. (2012):

Aftershock Seismicity of the 27 February 2010 Mw 8.8 Maule Earthquake Rupture Zone,

Earth and Planetary Science Letters, 317-318C, pp. 413-425, doi:10.1016/j.epsl.2011.11.034.

Moreno, M., Rosenau, M., Oncken, O.:
2010 Maule earthquake slip correlates with pre-seismic locking of Andean subduction zone

Nature, Vol 467, issue 7312, pp 198-202; DOI: 10.1038/nature09349