Complex Faulting and Triggered Rupture During the 2018 MW 7.9 Offshore Kodiak, Alaska, Earthquake
Ruppert, NA, Rollins, C, Zhang, A et al. (4 more authors)
(2018)
Complex Faulting and Triggered Rupture During the 2018 MW 7.9 Offshore Kodiak, Alaska, Earthquake.
Geophysical Research Letters, 45 (15).
pp. 7533-7541.
ISSN 0094-8276
Abstract
We combine aftershock relocations, source mechanisms, teleseismic P wave backprojection, and Global Positioning System data inversion to constrain complex faulting geometry of the 2018 MW 7.9 offshore Kodiak earthquake. Relocated aftershocks delineate several N‐S trends including a prominent 110‐km‐long segment, as well as broad NE‐SW trends. Global Positioning System modeling and backprojection indicate that the NE‐SW trending left‐lateral strike‐slip segments released most energy dominating far‐field crustal deformation and radiated wavefield. Backprojection infers fast E‐to‐W rupture propagations superimposed on a slower S‐to‐N migration. We propose a five‐segment model of the rupture that was partially driven by dynamic triggering.
CORE (COnnecting REpositories)
CORE (COnnecting REpositories)