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1984 Morgan Hill earthquake

Earthquake in San Francisco Bay Area, California

Field	Value
name	1984 Morgan Hill earthquake
map2	{{Location map+	USA California
relief	yes
{{Location map~	California	lat	40.80	long=-124.16	label_size=100	label=Eureka	mark=Green pog.svg}}
{{Location map~	California	lat	39.53	long=-119.82	label=Reno	label_size=100	mark=Green pog.svg}}
{{Location map~	California	lat	38.56	long=-121.47	label=Sacramento	label_size=100	position=left	mark=Green pog.svg}}
{{Location map~	California	lat	37.36	long=-118.4	label=Bishop	label_size=100	position=left	mark=Green pog.svg}}
{{Location map~	California	lat	38.87	long=-117.93	label_size=100	label=Gabbs	mark=Green pog.svg}}
{{Location map~	California	lat	35.37	long=-119.02	label_size=100	label=Bakersfield	mark=Green pog.svg}}
{{Location map~	California	lat	35.15	long=-120.65	label_size=100	label=Pismo Beach	position=left	mark=Green pog.svg}}
{{Location map~	California	lat	37.28	long=-121.76	mark=Bullseye1.png	marksize=40}}
position	top
width	250
float	right
caption	}}
timestamp	1984-04-24 21:15:21
isc-event	555788
anss-url	iscgem555788
local-date
local-time	13:15:21 PST
magnitude	6.2
depth	10 km
location
fault	Calaveras Fault
type	Strike-slip
affected	South Bay
Northern California
United States
damages	$7.5–8 million
intensity
pga	1.3 g at Coyote Dam
landslide	Yes
casualties	21–27 injured

| isc-event = 555788 | anss-url = iscgem555788 | local-date = | local-time = 13:15:21 PST Northern California United States

No fatalities

The 1984 Morgan Hill earthquake (also known as the Halls Valley earthquake) occurred on April 24 at 1:15 p.m. local time in the Santa Clara Valley of Northern California. The shock had a moment magnitude of 6.2 and a maximum Mercalli intensity of VIII (Severe). The epicenter was located near Mount Hamilton in the Diablo Range of the California Coast Ranges. Nearby communities (including Morgan Hill) sustained serious damage with financial losses of at least US$7.5 million.

Earthquake

The earthquake occurred along the Calaveras Fault, with the epicenter 16 km northeast of San Jose, and at a depth of 8 km. The shock was felt in Sacramento in California's central valley.

Damage

The earthquake was reported to be felt over an area of 120000 km2. Morgan Hill was the worst affected, with a number of mobile homes sliding off foundations, and moderate damage to several masonry buildings in the city. The communities of San Jose, San Martin and Coyote were some areas that experienced minor damage. In Santa Clara County, over 550 buildings were reported to have received at least minor damage.

Aftershocks

The outline of aftershocks show that the rupture propagated southeast over a 25 km section of the fault, as far as San Martin, to the location of the 1979 Coyote Lake earthquake's mainshock. That event's aftershock zone also stretched to the southeast.

References

"The Morgan Hill Earthquake of 1984". Earthquakes in Your Backyard – And Tsunamis.
Toppozada, T. R.. (1984). "Morgan Hill Earthquake of April 1984". California Geology.
Cockerham, R.S.. (1987). "The Morgan Hill, California, Earthquake of April 24, 1984". United States Geological Survey.
ISC. (2015). "ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009)". [[International Seismological Centre]].
(September 4, 2009). "PAGER-CAT Earthquake Catalog". United States Geological Survey.
Shakal, A.. (August 1984). "Morgan Hill earthquake – Caused record shaking force". California Geology.
(1993). "Seismicity of the United States, 1568–1989 (Revised)". [[United States Government Printing Office]].

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.

earthquakes-in-california morgan-hill,-california 1984-earthquakes 1984-in-california april-1984-in-the-united-states

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