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Title: Waveform analysis of aftershocks of the June 29, 1992 Little Skull Mountain, Nevada, earthquake

Abstract

Following the 29 June 1992 magnitude 5.6 Little Skull Mountain, Nevada, earthquake, twelve portable three-component digital seismometers were deployed in the region surrounding Little Skull Mountain and Yucca Mountain by researchers at the University of Nevada, Reno, Seismological Laboratory. These stations complemented the 55 permanent analog stations of the Southern Great Basin Seismic Network, and portable deployments of the United States Geological Survey (USGS), Golden, Colorado, and Lawrence Livermore National Laboratory, Livermore, California. The mainshock of the Little Skull Mountain earthquake occurred approximately 20 km southeast of the site at Yucca Mountain, Nevada, that is being characterized as a potential repository for high-level nuclear waste. The pattern of Little Skull Mountain aftershocks defines an L' shape at the southern boundary of the Nevada Test Site. The authors use a full waveform inversion method to study source properties of aftershocks in the epicentral area recorded on the digital stations. They compute the synthetic seismograms in a layered elastic media using the generalized reflection and transmission coefficient technique. The authors future plans include automation of these techniques for use in routine monitoring of seismic activity in the region. Parameters obtained in this study include focal mechanism, stress drop, rupture duration, and seismicmore » moment. These results will allow them to place constraints on the geometry and style of subsurface faulting in the region and aid in the assessment of seismic hazard in the vicinity of Yucca Mountain.« less

Authors:
; ;  [1]
  1. Univ. of Nevada, Reno, NV (United States)
Publication Date:
OSTI Identifier:
5095629
Report Number(s):
CONF-9305259-
Journal ID: ISSN 0016-7592; CODEN: GAAPBC
Resource Type:
Conference
Journal Name:
Geological Society of America, Abstracts with Programs; (United States)
Additional Journal Information:
Journal Volume: 25:5; Conference: 89. annual meeting of the Cordilleran Section and the 46th annual meeting of the Rocky Mountain Section of the Geological Society of America (GSA), Reno, NV (United States), 19-21 May 1993; Journal ID: ISSN 0016-7592
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; EARTHQUAKES; MONITORING; NEVADA; RADIOACTIVE WASTE FACILITIES; RISK ASSESSMENT; SITE CHARACTERIZATION; AFTERSHOCKS; DATA ANALYSIS; GEOLOGIC FAULTS; SEISMIC DETECTORS; SEISMIC EFFECTS; SEISMIC WAVES; SEISMICITY; WAVE FORMS; WAVE PROPAGATION; YUCCA MOUNTAIN; DEVELOPED COUNTRIES; GEOLOGIC FRACTURES; GEOLOGIC STRUCTURES; MEASURING INSTRUMENTS; MOUNTAINS; NORTH AMERICA; NUCLEAR FACILITIES; SEISMIC ARRAYS; SEISMIC EVENTS; USA; 580000* - Geosciences; 052002 - Nuclear Fuels- Waste Disposal & Storage; 540250 - Environment, Terrestrial- Site Resource & Use Studies- (1990-)

Citation Formats

Sheehan, A F, Zeng, Y, and Smith, K D. Waveform analysis of aftershocks of the June 29, 1992 Little Skull Mountain, Nevada, earthquake. United States: N. p., 1993. Web.
Sheehan, A F, Zeng, Y, & Smith, K D. Waveform analysis of aftershocks of the June 29, 1992 Little Skull Mountain, Nevada, earthquake. United States.
Sheehan, A F, Zeng, Y, and Smith, K D. Thu . "Waveform analysis of aftershocks of the June 29, 1992 Little Skull Mountain, Nevada, earthquake". United States.
@article{osti_5095629,
title = {Waveform analysis of aftershocks of the June 29, 1992 Little Skull Mountain, Nevada, earthquake},
author = {Sheehan, A F and Zeng, Y and Smith, K D},
abstractNote = {Following the 29 June 1992 magnitude 5.6 Little Skull Mountain, Nevada, earthquake, twelve portable three-component digital seismometers were deployed in the region surrounding Little Skull Mountain and Yucca Mountain by researchers at the University of Nevada, Reno, Seismological Laboratory. These stations complemented the 55 permanent analog stations of the Southern Great Basin Seismic Network, and portable deployments of the United States Geological Survey (USGS), Golden, Colorado, and Lawrence Livermore National Laboratory, Livermore, California. The mainshock of the Little Skull Mountain earthquake occurred approximately 20 km southeast of the site at Yucca Mountain, Nevada, that is being characterized as a potential repository for high-level nuclear waste. The pattern of Little Skull Mountain aftershocks defines an L' shape at the southern boundary of the Nevada Test Site. The authors use a full waveform inversion method to study source properties of aftershocks in the epicentral area recorded on the digital stations. They compute the synthetic seismograms in a layered elastic media using the generalized reflection and transmission coefficient technique. The authors future plans include automation of these techniques for use in routine monitoring of seismic activity in the region. Parameters obtained in this study include focal mechanism, stress drop, rupture duration, and seismic moment. These results will allow them to place constraints on the geometry and style of subsurface faulting in the region and aid in the assessment of seismic hazard in the vicinity of Yucca Mountain.},
doi = {},
journal = {Geological Society of America, Abstracts with Programs; (United States)},
issn = {0016-7592},
number = ,
volume = 25:5,
place = {United States},
year = {1993},
month = {4}
}

Conference:
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