HR: 1340h
AN: T23B-1420    [Abstracts]
TI: The January 13, 2007, Kuril Islands Outer Rise Earthquake
AU: * Polet, J
EM: jpolet@csupomona.edu
AF: California State Polytechnic University, Pomona, 3801 W. Temple Avenue, Pomona, CA 91768, United States
AU: Thio, H K
EM: hong_kie_thio@urscorp.com
AF: URS Corp, 566 El Dorado Street, Pasadena, CA 91101, United States
AB: We will present the results of an investigation of the January 13, 2007, Kuril Islands Mw=8.1 normal faulting outer rise earthquake that occurred in close proximity of an Mw=8.3 interplate event that took place two months earlier. Our primary interest is in determining the depth extent of its rupture process through the modeling of seismic waveforms and tsunami data. This earthquake was one of the greatest outer rise earthquakes of the past century and is certainly the best recorded. We will put this event in the context of a larger framework of worldwide outer rise earthquake occurrence in the past 35 years, using a catalog that we created by applying a search algorithm, based on earthquake mechanism in combination with local subduction zone geometry, to the Global CMT catalog. The January 13 earthquake was followed by a unproductive aftershock sequence and preceded by a significant number of events in the outer rise area following the Mw=8.3 interplate event of December 2006. We will also show the results of a basic analysis of the temporal and spatial characteristics of both of these sequences.
DE: 7203 Body waves
DE: 7215 Earthquake source observations (1240)
DE: 7219 Seismic monitoring and test-ban treaty verification
DE: 7240 Subduction zones (1207, 1219, 1240)
DE: 8170 Subduction zone processes (1031, 3060, 3613, 8413)
SC: Tectonophysics [T]
MN: 2007 Fall Meeting