Combining seismic arrays to image the high-frequency characteristics of large earthquakes

Eric Kiser; Miaki Ishii

doi:10.1111/j.1365-246X.2011.05299.x

Combining seismic arrays to image the high-frequency characteristics of large earthquakes

Eric Kiser, Miaki Ishii

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	1117-1128
Number of pages	12
Journal	Geophysical Journal International
Volume	188
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-246X.2011.05299.x
State	Published - Mar 2012
Externally published	Yes

Keywords

Earthquake dynamics
Earthquake source observations
Seismicity and tectonics
Subduction zone processes

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

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10.1111/j.1365-246X.2011.05299.x

Cite this

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Combining seismic arrays to image the high-frequency characteristics of large earthquakes

Abstract

Keywords

ASJC Scopus subject areas

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