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Combining seismic arrays to image the high-frequency characteristics of large earthquakes
Article first published online: 6 JAN 2012
DOI: 10.1111/j.1365-246X.2011.05299.x
© 2012 The Authors Geophysical Journal International © 2012 RAS
Additional Information
How to Cite
Kiser, E. and Ishii, M. (2012), Combining seismic arrays to image the high-frequency characteristics of large earthquakes. Geophysical Journal International, 188: 1117–1128. doi: 10.1111/j.1365-246X.2011.05299.x
Publication History
- Issue published online: 15 FEB 2012
- Article first published online: 6 JAN 2012
- Accepted 2011 November 14. Received 2011 November 12; in original form 2011 May 5
Keywords:
- Earthquake dynamics;
- Earthquake source observations;
- Seismicity and tectonics;
- Subduction zone processes
SUMMARY
This study investigates the source properties of the 2007 
8.0 Pisco, Peru, 2007 
8.4 and 7.9 Mentawai Islands, Indonesia, 2009 
8.1 Samoa Islands and 2010 
8.8 Maule, Chile, earthquakes using a backprojection technique that utilizes data from multiple seismic arrays. Combining seismic arrays increases azimuth and distance coverage and improves lateral resolution. The four subduction interface events show rupture propagation towards the bottom of the seismogenic zone. In addition, all of the earthquakes show evidence of multiple rupture segments with varying rupture speeds and directions. Relating these segments to the specific features of the subduction zones (e.g. interseismic coupling) suggests that asperity sizes may be controlled by subtle features of the subducted slab.