Guy-Greenbrier earthquake swarm

Guy-Greenbrier earthquake swarm
Map of earthquake epicenters for the period August 6, 2010 to March 1, 2011
Date	2010–11
Duration	Less than one year
Type	Intraplate earthquakes
Areas affected	Central Arkansas
Greatest magnitude	4.7 M_W
Total events	150-160 earthquakes^[1]

The Guy-Greenbrier earthquake swarm occurred in central Arkansas beginning in August 2010.^[2] The epicenters of earthquakes in the swarm showed a linear distribution, with a clear overall shift in activity towards the southwest with time,^[3] and the largest event in the swarm was the 2011 Arkansas earthquake, at 4.7 on the moment magnitude scale.^[3]

Cause

It has been suggested that the swarm was triggered by drilling activities associated with the exploration and production of shale gas in the Fayetteville Shale in northern Arkansas. Analysis of the swarm has found no link between this relatively shallow drilling and the earthquakes, but has instead suggested a link with deep waste disposal drilling similar to that identified at the Rocky Mountain Arsenal in the 1960s, and has led to a moratorium on such drilling being proposed covering an area of 1150 square miles.^[4]

References

↑ Peterson, Mark D.; Mueller, Charles S.; Moschetti, Morgan P.; Hoover, Susan M.; Rubinstein, Justin L.; Llenos, Andrea L.; Michael, Andrew J.; Ellsworth, William L.; McGarr, Arthur F.; Holland, Austin A.; Anderson, John G. (April 23, 2015). Incorporating Induced Seismicity in the 2014 United States National Seismic Hazard Model—Results of 2014 Workshop and Sensitivity Studies (USGS Open-File Report 2015–1070) (PDF) (Report). United States Geological Survey. p. 13. doi:10.3133/ofr20151070. ISSN 2331-1258. OCLC 38116130. Retrieved April 23, 2015.
↑ http://www.ceri.memphis.edu/GUY/
1 2 "Magnitude 4.7 - ARKANSAS". usgs.gov.
↑ Short, Louis (June 24, 2011). "Permanent injection well moratorium proposed". The Sun Times. Retrieved 3 July 2011.

Earthquakes in the United States

Historical	1638 New Hampshire 1663 Charlevoix 1700 Cascadia 1755 Cape Ann 1811–12 New Madrid 1812 Wrightwood 1857 Fort Tejon 1865 Memphis 1867 Manhattan, Kansas 1868 Hawaii 1868 Hayward 1872 Lone Pine 1872 North Cascades 1886 Charleston 1887 Sonora 1892 Laguna Salada

20th-century	1906 San Francisco 1906 Aleutian Islands 1909 Wabash River 1915 Pleasant Valley 1916 Irondale 1925 Santa Barbara 1931 Valentine 1933 Long Beach 1935 Helena 1940 El Centro 1940 New Hampshire 1944 Cornwall–Massena 1946 Aleutian Islands 1947 Wisconsin 1948 Desert Hot Springs 1949 Olympia 1952 Kern County 1957 Andreanof Islands 1957 San Francisco 1959 Hebgen Lake 1964 Alaska 1965 Rat Islands 1965 Olympia 1968 Illinois 1969 Santa Rosa 1971 San Fernando 1975 Near Islands 1975 Morris 1975 Hawaii 1979 Coyote Lake 1979 Imperial Valley 1980 Eureka 1983 Coalinga 1983 Borah Peak 1984 Morgan Hill 1986 North Palm Springs 1986 Chalfant Valley 1987 Whittier Narrows 1989 Loma Prieta 1991 Sierra Madre 1992 Cape Mendocino 1992 Landers 1992 Big Bear 1993 Scotts Mills 1993 Klamath Falls 1994 Northridge 1995 Marathon 1996 Duvall 1998 Pymatuning 1999 Hector Mine 2000 Yountville

21st-century	2001 Nisqually 2002 Denali 2003 Alabama 2003 San Simeon 2006 Gulf of Mexico 2006 Hawaii 2007 Alum Rock 2007 Andreanof Islands 2008 Illinois 2008 Chino Hills 2010 Eureka 2010 Illinois 2010 Baja California 2010 Indiana 2011 Colorado 2011 Virginia 2011 Oklahoma 2014 Aleutian Islands 2014 Southeast Alaska 2014 South Napa

Swarms	2001 Enola 2008 Reno 2010–11 Guy-Greenbrier 2012 Brawley 2009–16 Oklahoma

Coordinates: 35°17′N 92°22′W / 35.28°N 92.36°W / 35.28; -92.36

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Guy-Greenbrier earthquake swarm

Cause

See also

References