Complex Faulting and Triggered Rupture During the 2018 MW 7.9 Offshore Kodiak, Alaska, Earthquake

Ruppert, N. A.; Rollins, C.; Zhang, A.; Meng, L.; Holtkamp, S. G.; West, M. E.; Freymueller, J. T.

doi:10.1029/2018gl078931

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Complex Faulting and Triggered Rupture During the 2018 MW 7.9 Offshore Kodiak, Alaska, Earthquake

2018
By Ruppert, N. A. ; Rollins, C. ; Zhang, A. ; ...
Source: Geophysical Research Letters, 45(15), 7533-7541

[PDF-3.26 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Ruppert, N. A. ; Rollins, C. ; Zhang, A. ; Meng, L. ; Holtkamp, S. G. ; ... More +

Ruppert, N. A. ; Rollins, C. ; Zhang, A. ; Meng, L. ; Holtkamp, S. G. ; West, M. E. ; Freymueller, J. T. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

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.
Keywords:

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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 45(15), 7533-7541
DOI:

https://doi.org/10.1029/2018gl078931
ISSN:

0094-8276;1944-8007;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA13OAR4320056
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Library
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urn:sha256:959711dc3b785a5fb63d2f158bf774c98253118476b3d1ed455acacd4105fb3d
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https://repository.library.noaa.gov/view/noaa/59791/noaa_59791_DS1.pdf
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