dc.contributor.author Kiser, E. dc.contributor.author Ishii, Miaki dc.contributor.author Langmuir, Charles H. dc.contributor.author Shearer, P. M. dc.contributor.author Hirose, H. dc.date.accessioned 2012-11-27T16:35:41Z dc.date.issued 2011 dc.identifier.citation Kiser, E., Miaki Ishii, Charles H. Langmuir, P. M. Shearer, and H. Hirose. 2011. Insights into the mechanism of intermediate-depth earthquakes from source properties as imaged by back projection of multiple seismic phases. Journal of Geophysical Research Solid Earth 116:B06310. en_US dc.identifier.issn 0148-0227 en_US dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:9949241 dc.description.abstract This study investigates the spatial and temporal distribution of energy release of large, intermediate-depth earthquakes using a modified back projection technique first used to study the 2004 Sumatra-Andaman megathrust event. Multiple seismic phases are included in the back projection analysis, which provides the capability to determine the energy distribution with respect to depth and time. A total of 22 intermediate-depth earthquakes with moment magnitudes greater than or equal to 6.5 are investigated with hypocentral depths between 100 and 300 km. For most of these events, the vertical extent of energy release is either below the resolution of this study $(\leq5 km)$ or slightly above $(\leq15 km)$. This observation agrees with previous studies that find large, intermediate-depth earthquakes have subhorizontal rupture planes. The results also show a significant portion of the events have multiple rupture planes that are well separated in depth. The closeness in time of the ruptures on separate planes and the distance between the planes suggest dynamic triggering where the P waves from the first rupture initiate rupture on the second plane. We propose that a dehydration embrittlement mechanism combined with preferentially hydrated subhorizontal faults can explain the observations of dominant subhorizontal rupture planes and the frequent occurrence of rupture complexity involving multiple subevents. en_US dc.description.sponsorship Earth and Planetary Sciences en_US dc.language.iso en_US en_US dc.publisher American Geophysical Union en_US dc.relation.isversionof doi:10.1029/2010JB007831 en_US dash.license LAA dc.subject back projection en_US dc.subject intermediate-depth earthquakes en_US dc.title Insights into the Mechanism of Intermediate-Depth Earthquakes from Source Properties as Imaged by Back Projection of Multiple Seismic Phases en_US dc.type Journal Article en_US dc.description.version Version of Record en_US dc.relation.journal Journal of Geophysical Research Solid Earth en_US dash.depositing.author Langmuir, Charles H. dc.date.available 2012-11-27T16:35:41Z dc.identifier.doi 10.1029/2010JB007831 * dash.contributor.affiliated Ishii, Miaki dash.contributor.affiliated Langmuir, Charles
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