Skip to Main Content
Skip Nav Destination
GEOREF RECORD

The 2008 Wells, Nevada, earthquake sequence; source constraints using calibrated multiple-event relocation and InSar

Jennifer L. Nealy, Harley M. Benz, Gavin P. Hayes, Eric A. Bergman and William D. Barnhart
The 2008 Wells, Nevada, earthquake sequence; source constraints using calibrated multiple-event relocation and InSar
Bulletin of the Seismological Society of America (March 2017) 107 (3): 1107-1117

Abstract

The 2008 Wells, Nevada, earthquake represents the largest domestic event in the contiguous United States outside of California since the October 1983 Borah Peak earthquake in southern Idaho. We present an improved catalog, magnitude complete to 1.6, of the foreshock-aftershock sequence, supplementing the current U.S. Geological Survey Preliminary Determination of Epicenters catalog with 1928 well-located events. To create this catalog, both subspace and kurtosis detectors are used to obtain an initial set of earthquakes and associated locations. The latter are then calibrated through the implementation of the hypocentroidal decomposition method and relocated using the Bayesloc relocation technique. We additionally perform a finite-fault slip analysis of the mainshock using Interferometric Synthetic Aperture Radar (InSAR) observations. By combining the relocated sequence with the finite-fault analysis, we show that the aftershocks occur primarily up-dip and along the southwestern edge of the zone of maximum slip. The aftershock locations illuminate areas of postmainshock strain increase; aftershock depths, ranging from 5 to 16 km, are consistent with InSAR imaging, which shows that the Wells earthquake was a buried source with no observable near-surface offset. Electronic Supplement: Description of methods and figures of relocated aftershocks, interferograms, residuals, transformations, and seismic station locations.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 107
Serial Issue: 3
Title: The 2008 Wells, Nevada, earthquake sequence; source constraints using calibrated multiple-event relocation and InSar
Affiliation: U. S. Geological Survey, National Earthquake Information Center, Golden, CO, United States
Pages: 1107-1117
Published: 20170314
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 32
Accession Number: 2017-037471
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
N40°00'00" - N42°00'00", W116°00'00" - W113°00'00"
Secondary Affiliation: Global Seismological Services, USA, United StatesUniversity of Iowa, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201721
Program Name: USGSOPNon-USGS publications with USGS authors
Close Modal

or Create an Account

Close Modal
Close Modal