干旱区生态环境知识资源中心(Arid): Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field

Arid

DOI	10.1029/2020GL090949
	Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field
	Mesimeri, Maria; Pankow, Kristine L.; Barnhart, William D.; Whidden, Katherine M.; Hale, J. Mark
通讯作者	Mesimeri, M (corresponding author), Univ Utah, Univ Utah Seismograph Stn, Salt Lake City, UT 84112 USA.
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2021
卷号	48 期号:5
英文摘要	On September 12, 2018 and April 14, 2019 shallow (<2.5 km from the surface, <1 km relative to sea level) earthquakes (M-w 4.0 and 4.1, respectively) struck a relatively aseismic area in south-central Utah, within the Black Rock Desert volcanic field. Seismic waveforms are dominated by long-period energy, no clear direct S-wave arrivals, and signal durations of similar to 100 s. Using co-seismic interferograms, we detect clear and distinguishable surface deformation confirming the shallowness of the two mainshocks, while full moment tensor solutions rule out an isotropic source, such as an explosion or collapse. For the April 2019 sequence, we build an earthquake catalog using a dense temporary geophone array. The enhanced earthquake catalog shows a rapidly decaying aftershock sequence, with 85% of aftershocks occurring during the first three hours. Combining these observations, we argue that these earthquake sequences are related to the Black Rock Desert volcanic field. Plain Language Summary On September 12, 2018 and April 14, 2019 shallow (<2.5 km from the surface, <1 km relative to sea level) earthquakes (M-w 4.0 and 4.1, respectively) struck southcentral Utah, within the Black Rock Desert volcanic field. Seismic signals from these earthquakes were unusual and uncharacteristic for tectonic earthquakes, and we rule out the possibility of a mine collapse or explosion. We confirm that the two earthquakes are shallow and find distinguishable surface deformation. For the April 2019 sequence, we used advanced techniques in order to detect more earthquakes, taking advantage of a dense temporary network located near the mainshock. The new earthquake catalog, that contains three times more earthquakes than originally cataloged, shows that the earthquake sequence lasted for a few hours. Based on these findings, we hypothesize that the shallow earthquakes are related to the Black Rock volcanic field.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000627892100042
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350419
作者单位	[Mesimeri, Maria; Pankow, Kristine L.; Whidden, Katherine M.; Hale, J. Mark] Univ Utah, Univ Utah Seismograph Stn, Salt Lake City, UT 84112 USA; [Barnhart, William D.] Univ Iowa, Dept Earth & Environm Sci, Iowa City, IA USA; [Barnhart, William D.] US Geol Survey, Earthquake Hazards Program Off, Golden, CO USA
推荐引用方式 GB/T 7714	Mesimeri, Maria,Pankow, Kristine L.,Barnhart, William D.,et al. Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field[J]. United States Geological Survey,2021,48(5).
APA	Mesimeri, Maria,Pankow, Kristine L.,Barnhart, William D.,Whidden, Katherine M.,&Hale, J. Mark.(2021).Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field.GEOPHYSICAL RESEARCH LETTERS,48(5).
MLA	Mesimeri, Maria,et al."Unusual Seismic Signals in the Sevier Desert, Utah Possibly Related to the Black Rock Volcanic Field".GEOPHYSICAL RESEARCH LETTERS 48.5(2021).