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1915 Pleasant Valley earthquake

Field	Value
title	1915 Pleasant Valley earthquake
timestamp	1915-10-03 06:53:21
anss-url	iscgem913944
isc-event	913944
local-time	22:53:21
local-date	October 2, 1915
image	1915 Pleasant Valley earthquake scarp.jpg
imagecaption	The Tobin Range on the east side of the valley showing the fault scarp (marked by the white line)
map2	{{Location map+	Nevada
{{Location map~	Nevada	lat	40.97	long=-117.72	label_size=100	label=Winnemucca	position=left	mark=Green pog.svg}}
{{Location map~	Nevada	lat	40.64	long=-116.93	label_size=100	label=Battle Mountain	position=right	mark=Green pog.svg}}
{{Location map~	Nevada	lat	40.18	long=-118.48	label_size=100	label=Lovelock	position=left	mark=Green pog.svg}}
{{Location map~	Nevada	lat	40.26	long=-117.65	mark=Bullseye1.png	marksize=40}}
width	260
float	right
relief	yes }}
magnitude	6.8Mw, 7.7
depth	10 km
location
countries affected	Pershing County, Nevada
United States
damage	Limited
intensity

|anss-url = iscgem913944 |isc-event = 913944 |local-time = 22:53:21 |local-date = October 2, 1915 United States

The 1915 Pleasant Valley earthquake occurred at 22:53:21 on October 2 in north-central Nevada. With a moment magnitude of 6.8, a surface wave magnitude of 7.7, and a maximum Mercalli intensity of X (Extreme), it was the strongest earthquake ever recorded in the state.

Earthquake

The earthquake remains as one of the best examples ever for evidence of creating fault scarps along the west side of the Tobin Range. It produced four scarps, with a total length of 59 km, and re-ruptured Holocene scarps located at the bottom of the base of the mountain blocks. Among the scarps, the average vertical displacement among the affected areas was 2 m, and the maximum displacement of 5.8 m occurred near the old Pierce School site on Buskee Creek Canyon.

The rupture originated along an unnamed fault somewhere in the eastern side of Pleasant Valley, in north-central Nevada. The epicentral region was mostly uninhabited, so there was little property damage considering the very large magnitude.

Damage

The earthquake's damage was confined to within 80 km of the epicenter. Damage in Kennedy destroyed two adobe houses, collapsed several mine tunnels, and cracked concrete mine foundations. Winnemucca experienced damage to adobe buildings as well, and several multistory brick buildings lost coping and upper wall parts. Many chimneys were destroyed if they were above roof lines. Water tanks were knocked over in Battle Mountain, Kodiak, Lovelock, and Parran. Several ranches reported damage, all by the southern end of Pleasant Valley. More adobe houses were knocked down by the shaking; a masonry chicken house and a hog pen were destroyed; and houses were displaced from their foundations.

Aftershocks

The earthquake had several aftershocks which disturbed a significant amount of land in Northern Nevada.

References

"Extension and Quaternary Faulting in the Northern Central Nevada Seismic Belt".
(1984). "Earthquake History:OCTOBER 3, 1915 (M=7.3)". Wallace.
Mt. Tobin, Nev 15 minute topographic quadrangle, 1961, USGS
(1993). "Seismicity of the United States, 1568–1989 (Revised)". [[United States Government Printing Office]].
"M 6.8 – 64 km SE of Imlay, Nevada". United States Geological Survey.
Gunn, Angus M.. (2008). "Encyclopedia of Disasters". Greenwood Publishing Group.
ISC. (2015). "ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009)". [[International Seismological Centre]].
National Geophysical Data Center / World Data Service (NGDC/WDS). (1972). "Significant Earthquake Database". [[National Geophysical Data Center]], [[National Oceanic and Atmospheric Administration.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

1915-earthquakes earthquakes-in-nevada 1915-in-nevada 1915-natural-disasters-in-the-united-states october-1915-in-the-united-states

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