List of earthquakes in the United States

Last updated

The following is a list of notable earthquakes and tsunamis which had their epicenter in areas that are now part of the United States with the latter affecting areas of the United States. Those in italics were not part of the United States when the event occurred.

Contents

List of earthquakes

DateState(s) Magnitude FatalitiesArticleFurther information
June 11, 1585 Aleutian Islands, Alaska 9.2 Mw Unknown 1585 Aleutian Islands earthquake
January 26, 1700 Washington, Oregon, California 8.7–9.2 Mw Unknown 1700 Cascadia earthquake
November 18, 1755Massachusetts5.9 Mw 0 1755 Cape Ann earthquake
July 21, 1788 Alaska 8.0 Ms Unknown [1]
August 6, 1788Alaska8.0 Ms Unknown [1]
December 16, 1811Missouri7.5–8.0 Mw 100−500 1811–1812 New Madrid earthquakes
December 8, 1812California6.9 Mla , 7.5 Mw 40+ 1812 San Juan Capistrano earthquake
December 12, 1812California7.1–7.5 Mw 1 1812 Ventura earthquake
June 2, 1823Hawaii7.0 ML 0 [2]
June 1838California6.8–7.2 Mw 0 1838 San Andreas earthquake
January 5, 1843Arkansas6.3 Mw 0 [2]
January 9, 1857California7.9 Mw 2 1857 Fort Tejon earthquake
April 24, 1867Kansas5.1 Mfa 0 1867 Manhattan, Kansas earthquake
April 2, 1868Hawaii7.9 Mfa 77 1868 Hawaii earthquake
October 21, 1868California6.3–6.7 ML 30 1868 Hayward earthquake
February 20, 1871Hawaii6.8 ML 0 1871 Lānaʻi earthquake [2]
March 26, 1872California7.4–7.9 Mw 27 1872 Owens Valley earthquake [3]
December 14, 1872Washington6.5–7.0 Mw 0 1872 North Cascades earthquake
November 23, 1873California-Oregon7.3 ML 01873 Oregon-California earthquake [2]
October 26, 1880Alaska7.0 Ms 0 [1]
August 10, 1884New York4.9–5.5 Mfa 2
August 31, 1886South Carolina6.9–7.3 Mw 60 1886 Charleston earthquake
April 19, 1892California6.4 ML 1 1892 Vacaville–Winters earthquakes [2]
April 21, 1892California6.4 ML 0 1892 Vacaville–Winters earthquakes [2]
October 31, 1895Missouri6.6 ML 0 1895 Charleston earthquake [2]
September 4, 1899Alaska8.2 Ms 0 1899 Yakutat Bay earthquakes [1]
September 10, 1899Alaska8.2 Mw 0 1899 Yakutat Bay earthquakes [1]
December 25, 1899California6.4 Ms 6 1899 San Jacinto earthquake [1]
October 9, 1900Alaska7.9 Mw 0 [4]
November 14, 1901Utah7.0 Mw 0 1901 Richfield earthquake
December 31, 1901Alaska7.8 Ms 0 [1]
January 1, 1902Alaska7.8 M0 [1]
August 27, 1904Alaska7.3 Ms 0 [2]
April 18, 1906California7.9 Mw 3,000+ 1906 San Francisco earthquake
August 17, 1906Alaska8.4 Mw 0 1906 Aleutian Islands earthquake
September 27, 1909Indiana5.1 Mfa 0 1909 Wabash River earthquake
June 23, 1915California6.2 M6 1915 Imperial Valley earthquakes
October 3, 1915Nevada6.8 Mw 0 1915 Pleasant Valley earthquake
April 21, 1918California6.8 M0 1918 San Jacinto earthquake
September 29, 1921Utah6.3 Mw 0 1921 Sevier Valley earthquake
January 31, 1922California7.6 MGR 0 [2]
January 22, 1923California7.2 MGR 0 [2]
June 28, 1925Montana6.6 Mw 0 1925 Montana earthquake
June 29, 1925California6.5–6.8 Mw 13 1925 Santa Barbara earthquake
October 24, 1927Alaska7.3 Mw 0 [5]
November 4, 1927California7.3 Mw 0 1927 Lompoc earthquake [1]
March 7, 1929Alaska7.8 Mw 0 [6]
August 16, 1931Texas6.5 Mw 0 1931 Valentine earthquake
December 21, 1932Nevada7.2 Mw 0 1932 Cedar Mountain earthquake [2]
March 10, 1933California6.4 Mw 120 1933 Long Beach earthquake
December 31, 1934California7.1 M0 [1]
March 12, 1934Utah6.6 Mw 2 1934 Hansel Valley earthquake [7]
October 18, 1935Montana6.2 Ms 4 1935 Helena earthquake
July 15, 1936Oregon, Washington5.8 ML 0 1936 State Line earthquake
July 22, 1937Alaska7.3 Ms 01937 Alaska earthquake [2]
November 10, 1938Alaska8.2 Mw 0 [8]
May 18, 1940California6.9 Mw 9 1940 El Centro earthquake
December 20, 1940New Hampshire5.3 Mw 0 1940 New Hampshire earthquakes
December 24, 1940New Hampshire5.5 Mw 0 1940 New Hampshire earthquakes
November 3, 1943Alaska7.6 Mw 0 [9]
September 5, 1944New York5.8 Mw 0 1944 Cornwall–Massena earthquake
April 1, 1946Alaska8.6 Mw 165 1946 Aleutian Islands earthquake
October 16, 1947Alaska7.2 Mw 0 [2]
December 4, 1948California6.4 Mw 0 1948 Desert Hot Springs earthquake
April 13, 1949Washington6.7 Mw 8 1949 Olympia earthquake
July 21, 1952California7.3 Mw 14 1952 Kern County earthquake
July 6, 1954Nevada6.6 Mw 0 1954 Rainbow Mountain earthquake [2]
August 24, 1954Nevada6.8 Mw 0 1954 Stillwater earthquake [2]
December 16, 1954Nevada7.1 Mw 0 1954 Fairview Peak earthquake [2]
December 16, 1954Nevada6.8 Mw 0 1954 Dixie Valley earthquake [2]
March 9, 1957Alaska8.6 Mw 0 1957 Andreanof Islands earthquake
April 7, 1958Alaska7.3 Mw 0 1958 Huslia earthquake [2]
July 9, 1958Alaska7.8 Mw 5 (tsunami) 1958 Lituya Bay earthquake and megatsunami
August 18, 1959Montana, Wyoming, Idaho7.2 Mw 28+ 1959 Hebgen Lake earthquake
March 27, 1964Alaska9.2 Mw 143 1964 Alaska earthquake
February 4, 1965Alaska8.7 Mw 0 1965 Rat Islands earthquake
April 29, 1965Washington6.7 Mw 7 1965 Puget Sound earthquake
July 2, 1965Alaska7.8 Mw 0 [10]
August 9, 1967Colorado5.30 Rocky Mountain Arsenal#Deep injection well
November 26, 1967Colorado5.20 Rocky Mountain Arsenal#Deep injection well
April 8, 1968California6.6 Mw 0 1968 Borrego Mountain earthquake
November 9, 1968Illinois5.4 mb 0 1968 Illinois earthquake
October 2, 1969California5.6, 5.7 ML 1 1969 Santa Rosa earthquakes Doublet
February 9, 1971California6.5–6.7 Mw 58–65 1971 San Fernando earthquake
July 30, 1972Alaska7.6 Mw 0 [11]
February 2, 1975Alaska7.6 Ms 0 1975 Near Islands earthquake
November 29, 1975Hawaii7.7 Mw 2 1975 Hawaii earthquake [12]
November 8, 1980California7.2 Mw 5 1980 Eureka earthquake [13]
May 2, 1983California6.5 Mw 0 1983 Coalinga earthquake
November 16, 1983Hawaii6.7 Mw 0 1983 Kaoiki earthquake [2]
October 28, 1983Idaho7.3 Mw 2 1983 Borah Peak earthquake
April 24, 1984California6.2 Mw 0 1984 Morgan Hill earthquake
May 7, 1986Alaska8.0 Mw 0 [14] [15]
July 8, 1986California6.0 Mw 0 1986 North Palm Springs earthquake
July 21, 1986California6.4 ML 0 1986 Chalfant Valley earthquake [16]
October 1, 1987California5.9 Mw 8 1987 Whittier Narrows earthquake
November 23, 1987California6.2 Ms 0 1987 Superstition Hills earthquakes [1]
November 24, 1987California6.6 Mw 2 1987 Superstition Hills earthquakes
November 30, 1987Alaska7.9 Mw 0 [17]
March 6, 1988Alaska7.8 Mw 0 [18]
October 17, 1989California6.9 Mw 63 1989 Loma Prieta earthquake
September 4, 1989Alaska7.1 Mw 0 [19]
May 30, 1991Alaska7.0 Mw 0 [20]
June 28, 1991California5.6 Mw 2 1991 Sierra Madre earthquake
August 17, 1991Oregon7.0 Mh 0 [21]
April 23, 1992California6.3 Ms 0 1992 Joshua Tree earthquake [1]
April 25–26, 1992California6.5–7.2 Mw 0 1992 Cape Mendocino earthquakes
June 28, 1992California7.3 Mw 3 1992 Landers earthquake
June 28, 1992California6.5 Mw 0 1992 Big Bear earthquake
September 2, 1992Utah5.8 ML 0 1992 St. George earthquake [22]
March 25, 1993Oregon5.6 Md 0 1993 Scotts Mills earthquake
September 20, 1993Oregon6.0 Md 2 1993 Klamath Falls earthquakes
January 17, 1994California6.7 Mw 57 1994 Northridge earthquake
September 1, 1994California7.0 Mw 01994 Northern California earthquake [23]
April 14, 1995Texas5.7 Mw 0 1995 Marathon earthquake
June 10, 1996Alaska7.9 Mwc 0 [24]
September 25, 1998Pennsylvania5.2 mbLg 0 1998 Pymatuning earthquake
October 16, 1999California7.1 Mw 0 1999 Hector Mine earthquake
December 6, 1999Alaska7.0 Mw 0 [25]
January 10, 2001Alaska7.0 Mw 0 [26]
February 28, 2001Washington6.8 Md 1 2001 Nisqually earthquake
November 3, 2002Alaska7.9 Mw 0 2002 Denali earthquake
November 17, 2003Alaska7.8 Mwc 02003 Alaska earthquake [27]
December 22, 2003California6.5 Mw 2 2003 San Simeon earthquake
June 15, 2005California7.2 Mwc 0 [28]
September 10, 2006Florida5.9 Mwc 0 2006 Gulf of Mexico earthquake
October 15, 2006Hawaii6.7 Md 0 2006 Kiholo Bay earthquake
October 30, 2007California5.5 Mw 0 2007 Alum Rock earthquake
February 21, 2008Nevada5.9 Mw 0 2008 Wells earthquake
April 18, 2008Illinois5.2 Mw 0 2008 Illinois earthquake
July 29, 2008California5.4 Mw 0 2008 Chino Hills earthquake
January 9, 2010California6.5 Mw 0 2010 Eureka earthquake
April 4, 2010California7.2 Mw 0 2010 Baja California earthquake
August 22, 2011Colorado5.3 Mwr 0 2011 Colorado earthquake
August 23, 2011Virginia5.8 Mw 0 2011 Virginia earthquake
November 5, 2011Oklahoma5.7 Mww 0 2011 Oklahoma earthquake
January 5, 2013Alaska7.5 Mw 0 2013 Craig, Alaska earthquake [29]
March 29, 2014California5.1 Mw 0 2014 La Habra earthquake
June 23, 2014Alaska7.9 Mww 0 2014 Aleutian Islands earthquake
July 25, 2014Alaska6.0 Mw 0 2014 Palma Bay earthquake
August 24, 2014California6.0 Mw 1 2014 South Napa earthquake
January 24, 2016Alaska7.1 Mw 0 2016 Old Iliamna earthquake
September 3, 2016Oklahoma5.8 Mww 0 2016 Oklahoma earthquake
January 23, 2018Alaska7.9 Mww 0 2018 Gulf of Alaska earthquake
May 4, 2018Hawaii6.9 Mww 0 2018 Hawaii earthquake
November 30, 2018Alaska7.1 Mww 0 2018 Anchorage earthquake
July 4, 2019California6.4 Mw 1 2019 Ridgecrest earthquakes
July 5, 2019California7.1 Mw 0 2019 Ridgecrest earthquakes
March 18, 2020Utah5.7 Mw 0 2020 Salt Lake City earthquake
March 31, 2020Idaho6.5 Mww 0 2020 Central Idaho earthquake
May 15, 2020Nevada6.5 ML 0 2020 Monte Cristo Range earthquake [30]
July 22, 2020Alaska7.8 Mw 0 2020 Alaska Peninsula earthquake [31]
August 9, 2020North Carolina5.1 Mw 0 2020 Sparta earthquake [32]
October 19, 2020Alaska7.6 Mww 0 2021 Chignik earthquake § October 2020 [33]
July 29, 2021Alaska8.2 Mw 0 2021 Chignik earthquake [34]
December 20, 2022California6.4 Mw2 2022 Ferndale earthquake [35]
April 5, 2024New Jersey4.8 Mw0 2024 New Jersey earthquake [36]
December 5, 2024California7.0 Mw0 2024 Cape Mendocino earthquake [37]
Two-percent probability of exceedance in 50 years map of peak ground acceleration from the United States Geological Survey, released July 17, 2014 2014 pga2pct50yrs (vector).svg
Two-percent probability of exceedance in 50 years map of peak ground acceleration from the United States Geological Survey, released July 17, 2014

Earthquake swarms which affected the United States:

Earthquakes which affected the United States but whose epicenters were outside the United States borders:

Earthquakes which did not affect the United States directly, but caused tsunamis which did:

List of strongest earthquakes by states and territories

State(s)MagnitudeDateFurther information
Flag of Alabama.svg  Alabama 5.1 ML October 18, 1916 1916 Irondale earthquake
Flag of Alaska.svg  Alaska 9.2March 27, 1964 1964 Alaska earthquake
Flag of American Samoa.svg  American Samoa 8.3–8.5June 26, 1917 1917 Samoa earthquake
Flag of Arizona.svg  Arizona 7.6May 3, 1887 1887 Sonora earthquake
Flag of Arkansas.svg  Arkansas 7.6–7.9December 16, 1811 1811–1812 New Madrid earthquakes
Flag of California.svg  California 7.9January 9, 1857 1857 Fort Tejon earthquake
Flag of Colorado.svg  Colorado 6.6November 8, 1882 [40]
Flag of Connecticut.svg  Connecticut 4.4–5.0 Ms May 16, 1791 [41]
Flag of Delaware.svg  Delaware 4.1 ML November 30, 2017 [42]
Flag of Washington, D.C.svg  District of Columbia 5.8August 23, 2011 2011 Virginia earthquake
Flag of Florida.svg  Florida 4.4January 12, 1879 [43]
Flag of Georgia (U.S. state).svg  Georgia (U.S. state) 4.5March 5, 1914 [44]
Flag of Guam.svg  Guam 8.1September 22, 1902 [1]
Flag of Hawaii.svg  Hawaii 7.9April 2, 1868 1868 Hawaii earthquake
Flag of Idaho.svg  Idaho 6.9October 28, 1983 1983 Borah Peak earthquake
Flag of Illinois.svg  Illinois 5.3November 9, 1968 1968 Illinois earthquake
Flag of Indiana.svg  Indiana 5.1September 27, 1909 1909 Wabash River earthquake
Flag of Iowa.svg  Iowa 5.0–5.1November 12, 1934 [45]
Flag of Kansas.svg  Kansas 5.1April 24, 1867 1867 Manhattan, Kansas earthquake
Flag of Kentucky.svg  Kentucky 7.6–7.9December 16, 1811 1811–1812 New Madrid earthquakes
Flag of Louisiana.svg  Louisiana 4.2 ML October 19, 1930 [46]
Flag of Maine.svg  Maine 5.9March 21, 1904 [47]
Flag of Maryland.svg  Maryland 5.8August 23, 2011 2011 Virginia earthquake
Flag of Massachusetts.svg  Massachusetts 5.9November 18, 1755 1755 Cape Ann earthquake
Flag of Michigan.svg  Michigan 4.6 ML August 10, 1947 [48]
Flag of Minnesota.svg  Minnesota 4.6 ML July 9, 1975 1975 Morris earthquake
Flag of Mississippi.svg  Mississippi 7.6–7.9December 16, 1811 1811–1812 New Madrid earthquakes
Flag of Missouri.svg  Missouri 7.6–7.9December 16, 1811 1811–1812 New Madrid earthquakes
Flag of Montana.svg  Montana 7.2August 17, 1959 1959 Hebgen Lake earthquake
Flag of Nebraska.svg  Nebraska 7.0November 15, 1877 [49]
Flag of Nevada.svg  Nevada 7.3December 16, 1954 1954 Fairview earthquake
Flag of New Hampshire.svg  New Hampshire 6.5June 1, 1638 1638 New Hampshire earthquake
Flag of New Jersey.svg  New Jersey 5.3November 29, 1783 1783 New Jersey earthquake
Flag of New Mexico.svg  New Mexico 6.2November 15, 1906 [50]
Flag of New York.svg  New York 5.8September 5, 1944 1944 Cornwall–Massena earthquake
Flag of North Carolina.svg  North Carolina 5.2February 21, 1916 [51]
Flag of North Dakota.svg  North Dakota 4.4July 8, 1968 [52]
Flag of Ohio.svg  Ohio 5.4March 9, 1937 [53]
Flag of Oklahoma.svg  Oklahoma 5.8September 3, 2016 2016 Oklahoma earthquake
Flag of Oregon.svg  Oregon 8.7–9.2January 26, 1700 1700 Cascadia earthquake
Flag of Pennsylvania.svg  Pennsylvania 5.2September 25, 1998 1998 Pymatuning earthquake
Flag of Puerto Rico.svg  Puerto Rico 8.0–8.3May 2, 1787 1787 Boricua earthquake
Flag of Rhode Island.svg  Rhode Island 4.7June 10, 1951 [54]
Flag of South Carolina.svg  South Carolina 6.9–7.3August 31, 1886 1886 Charleston earthquake
Flag of South Dakota.svg  South Dakota 4.5June 2, 1911 [55]
Flag of Tennessee.svg  Tennessee 7.6–7.9December 16, 1811 1811–1812 New Madrid earthquakes
Flag of Texas.svg  Texas 6.5August 16, 1931 1931 Valentine earthquake
Flag of Utah.svg  Utah 7.0November 13, 1901 1901 Richfield earthquake
Flag of the United States Virgin Islands.svg  U.S. Virgin Islands 7.5November 18, 1867 1867 Virgin Islands earthquake and tsunami
Flag of Vermont.svg  Vermont 4.0March 31, 1953 [56]
Flag of Virginia.svg  Virginia 5.8August 23, 2011 2011 Virginia earthquake
Flag of Washington.svg  Washington (state) 8.7–9.2January 26, 1700 1700 Cascadia earthquake
Flag of West Virginia.svg  West Virginia 5.8August 23, 2011 2011 Virginia earthquake
Flag of Wisconsin.svg  Wisconsin unk.May 6, 1947 1947 Wisconsin earthquake
Flag of Wyoming.svg  Wyoming 7.2August 17, 1959 1959 Hebgen Lake earthquake

See also

Related Research Articles

<span class="mw-page-title-main">1946 Aleutian Islands earthquake</span> Earthquake near the Aleutian Islands, Alaska

The 1946 Aleutian Islands earthquake occurred near the Aleutian Islands, Alaska on April 1, 1946. The shock measured 8.6, Mt 9.3 or 7.4. It had a maximum Mercalli intensity of VI (Strong). It resulted in 165–173 casualties and over US$26 million in damage. The seafloor along the fault was elevated, triggering a Pacific-wide tsunami with multiple destructive waves at heights ranging from 45–138 ft (14–42 m). The tsunami obliterated the Scotch Cap Lighthouse on Unimak Island, Alaska among others, and killed all five lighthouse keepers. Despite the destruction to the Aleutian Island Unimak, the tsunami had almost an imperceptible effect on the Alaskan mainland.

<span class="mw-page-title-main">Kamchatka earthquakes</span> Earthquakes in the Kamchatka Peninsula, far eastern Russia

Many major earthquakes have occurred in the region of the Kamchatka Peninsula in far eastern Russia. Events in 1737, 1923 and 1952, were megathrust earthquakes and caused tsunamis. There are many more earthquakes and tsunamis originating from the region.

<span class="mw-page-title-main">Aleutian Trench</span> An oceanic trench along the southern coastline of Alaska and the Aleutian islands

The Aleutian Trench is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands. The trench extends for 3,400 kilometres (2,100 mi) from a triple junction in the west with the Ulakhan Fault and the northern end of the Kuril–Kamchatka Trench, to a junction with the northern end of the Queen Charlotte Fault system in the east. It is classified as a "marginal trench" in the east as it runs along the margin of the continent. The subduction along the trench gives rise to the Aleutian Arc, a volcanic island arc, where it runs through the open sea west of the Alaska Peninsula. As a convergent plate boundary, the trench forms part of the boundary between two tectonic plates. Here, the Pacific plate is being subducted under the North American plate at a dip angle of nearly 45°. The rate of closure is 7.5 centimetres (3 in) per year.

The 1957 Andreanof Islands earthquake occurred at 04:22 local time on March 9 with a moment magnitude estimated at 8.6 and a maximum Modified Mercalli intensity of VIII (Severe). It occurred south of the Andreanof Islands group, which is part of the Aleutian Islands arc. The event occurred along the Aleutian Trench, the convergent plate boundary that separates the Pacific plate and the North American plates near Alaska. A basin-wide tsunami followed, with effects felt in Alaska and Hawaii, and strong waves recorded across the Pacific rim. Total losses were around $5 million.

<span class="mw-page-title-main">2002 Denali earthquake</span> 7.9 magnitude; November 3, 2002

The 2002 Denali earthquake occurred at 22:12:41 UTC November 3 with an epicenter 66 km ESE of Denali National Park, Alaska, United States. This 7.9 Mw earthquake was the largest recorded in the United States in 37 years. The shock was the strongest ever recorded in the interior of Alaska. Due to the remote location, there were no fatalities and only one injury.

<span class="mw-page-title-main">2010 Chile earthquake</span> Magnitude 8.8 earthquake in Chile on 27 February 2010

The 2010 Chile earthquake and tsunami occurred off the coast of central Chile on Saturday, 27 February at 03:34:12 local time, having a magnitude of 8.8 on the moment magnitude scale, with intense shaking lasting for about three minutes. It was felt strongly in six Chilean regions that together make up about 80 percent of the country's population. According to the United States Geological Survey (USGS) the cities experiencing the strongest shaking—VIII (Severe) on the Mercalli intensity scale (MM)—were Concepción, Arauco, and Coronel. According to Chile's Seismological Service, Concepción experienced the strongest shaking at MM IX (Violent). The earthquake was felt in the capital Santiago at MM VII or MM VIII. Tremors were felt in many Argentine cities, including Buenos Aires, Córdoba, Mendoza, and La Rioja. Tremors were felt as far north as the city of Ica in southern Peru. It is the largest earthquake to hit Chile since the 1960 Valdivia earthquake.

The 1965 Rat Islands earthquake occurred at 05:01 UTC, on 4 February. It had a magnitude of 8.7 and triggered a tsunami of over 10 m on Shemya Island, but caused very little damage.

The 2014 Aleutian Islands earthquake occurred on 23 June at 11:53 HDT (UTC-9) with a moment magnitude of 7.9 and a maximum Mercalli intensity of VIII (Severe). The shock occurred in the Aleutian Islands – part of the US state of Alaska – 19 miles (31 km) southeast of Little Sitkin Island.

<span class="mw-page-title-main">2018 Gulf of Alaska earthquake</span> Earthquake in Gulf of Alaska

On January 23, 2018, at 00:31 AKST, an earthquake occurred in the Gulf of Alaska near Kodiak Island. The earthquake, measured at 7.9 on the Mw scale, was approximately 280 kilometers (170 mi) southeast of Kodiak and happened at a depth of 25 kilometers (16 mi).

The 2019 Cotabato earthquakes were an earthquake swarm which struck the province of Cotabato on the island of Mindanao in the Philippines in October 2019. Three of these earthquakes were above 6.0 on the moment magnitude scale with a Mercalli intensity of VIII. More than 40 people have been reported dead or missing and nearly 800 were injured as a result of these events.

On July 18, 2017, an earthquake struck near the Komandorski Islands, east of the Kamchatka Peninsula in the Bering Sea at 11:34 local time. Although there were no casualties from this earthquake, it was notable for a rare characteristic known as supershear, and is one of the few times a large supershear earthquake has been observed. It was preceded by a few foreshocks months earlier, and aftershocks that continued for nearly six months.

<span class="mw-page-title-main">2021 Chignik earthquake</span> 7th largest earthquake in the US

An earthquake occurred off the coast of the Alaska Peninsula on July 28, 2021, at 10:15 p.m. local time. The large megathrust earthquake had a moment magnitude of 8.2 according to the United States Geological Survey (USGS). A tsunami warning was issued by the National Oceanic and Atmospheric Administration (NOAA) but later cancelled. The mainshock was followed by a number of aftershocks, including three that were of magnitude 5.9, 6.1 and 6.9 respectively.

The 1979 Saint Elias earthquake affected Alaska at 12:27 AKST on 28 February. The thrust-faulting Mw 7.5 earthquake had an epicenter in the Granite Mountains. Though the maximum recorded Modified Mercalli intensity was VII, damage was minimal and there were no casualties due to the remoteness of the faulting. Damage also extended across the border in parts of Yukon, Canada.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database (1972). "Significant Earthquakes Search, country=USA". NOAA National Centers for Environmental Information. doi:10.7289/V5TD9V7K.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 "Preferred Magnitudes of Selected Significant Earthquakes" (PDF). United States Geological Survey. June 24, 2013. Archived (PDF) from the original on August 31, 2020. Retrieved May 5, 2020.
  3. ↑ "M 6.8 – Owens Valley, California". United States Geological Survey. Archived from the original on August 3, 2020. Retrieved January 23, 2020.
  4. ↑ "M 7.9 – Kodiak Island region, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  5. ↑ "M 7.3 – Southeastern Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  6. ↑ "M 7.8 – south of the Aleutian Islands". United States Geological Survey. Archived from the original on December 31, 2019. Retrieved August 13, 2019.
  7. ↑ "M 6.6 – Utah". United States Geological Survey. Archived from the original on August 3, 2020. Retrieved January 23, 2020.
  8. ↑ "M 8.2 – Alaska Peninsula". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  9. ↑ "M 7.6 – Southern Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  10. ↑ "M 7.8 – Fox Islands, Aleutian Islands, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  11. ↑ "M 7.6 – Southeastern Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  12. ↑ "M 7.7 – Kalapana Earthquake". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  13. ↑ "M 7.2 – offshore Northern California". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  14. ↑ "M 8.0 – Andreanof Islands, Aleutian Islands, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  15. ↑ Das, Shamita; Kostrov, B. V. (1990). "Inversion for seismic slip rate history and distribution with stabilizing constraints: Application to the 1986 Andreanof Islands Earthquake". Journal of Geophysical Research: Solid Earth. 95 (B5): 6899–6913. Bibcode:1990JGR....95.6899D. doi:10.1029/JB095iB05p06899. ISSN   2156-2202. Archived from the original on June 15, 2021. Retrieved June 15, 2021.
  16. ↑ "M 6.4 – Central California". United States Geological Survey. Archived from the original on August 3, 2020. Retrieved January 23, 2020.
  17. ↑ "M 7.9 – Gulf of Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  18. ↑ "M 7.8 – Gulf of Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  19. ↑ "M 7.1 – south of Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  20. ↑ "M 7.0 – Alaska Peninsula". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  21. ↑ "M 7.0 – 136 km WSW of Brookings, Oregon". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  22. ↑ "1992 – St. George, UT – M 5.8". quake.utah.edu. Intermountain Seismic Belt Historical Earthquake Project. Archived from the original on March 18, 2020. Retrieved March 18, 2020.
  23. ↑ "M 7.0 – off the coast of Northern California". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  24. ↑ "M 7.9 – Andreanof Islands, Aleutian Islands, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  25. ↑ "M 7.0 – Kodiak Island region, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  26. ↑ "M 6.9 – Kodiak Island region, Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  27. ↑ "M 7.8 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. Archived from the original on August 3, 2020. Retrieved January 23, 2020.
  28. ↑ "M 7.2 – off the coast of Northern California". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  29. ↑ "M 7.5 – Southeastern Alaska". United States Geological Survey. Archived from the original on August 13, 2019. Retrieved August 13, 2019.
  30. ↑ "M 6.5 – 56 km W of Tonopah, Nevada". United States Geological Survey. Archived from the original on December 11, 2020. Retrieved May 15, 2020.
  31. ↑ "M 7.8 – 99 km SSE of Perryville, Alaska". United States Geological Survey. Archived from the original on July 22, 2020. Retrieved May 12, 2024.
  32. ↑ "M 5.1 – 4 km SE of Sparta, North Carolina". United States Geological Survey. Archived from the original on August 9, 2020. Retrieved August 12, 2020.
  33. ↑ "M 7.6 – 99 km SE of Sand Point, Alaska". United States Geological Survey. Archived from the original on November 1, 2020. Retrieved October 19, 2020.
  34. ↑ "M 8.2 – Alaska Peninsula". United States Geological Survey. Archived from the original on July 29, 2021. Retrieved July 29, 2021.
  35. ↑ "M 6.4 – 15 km WSW of Ferndale, CA". United States Geological Survey. Retrieved December 28, 2022.
  36. ↑ "M 6.4 – 15 km WSW of Lebanon, NJ". United States Geological Survey. Retrieved December 28, 2022.
  37. ↑ "M 7.0 - 2024 Offshore Cape Mendocino, California Earthquake". United States Geological Survey. Retrieved December 5, 2024.
  38. ↑ Healy, J.H.; Rubey, W.W.; Griggs, D.T.; Raleigh, C.B. (September 27, 1968). "The Denver Earthquakes: disposal of waste fluids by injection into a deep well has triggered earthquakes near Denver, Colorado" (PDF). Science . 161 (3848): 1301–1310. doi:10.1126/science.161.3848.1301. PMID   17831340. Archived (PDF) from the original on April 25, 2015. Retrieved July 13, 2015.
  39. ↑ Gibbons, Helen (November 2009). "USGS Scientists Respond to Deadly Samoa Tsunami". United States Geological Survey. Archived from the original on May 5, 2015. Retrieved May 5, 2015.
  40. ↑ "M 6.6 – Front Range, west of Fort Collins, Colorado". United States Geological Survey.
  41. ↑ "Largest Earthquake in Connecticut – Today in History: May 16". connecticuthistory.org. May 16, 2020. Retrieved April 16, 2022.
  42. ↑ "M 4.1 – 3 km NNE of Little Creek, Delaware". United States Geological Survey. Retrieved April 16, 2022.
  43. ↑ Bridges, C.A. "What was Florida's largest earthquake?". The Daytona Beach News Journal. Retrieved January 1, 2024.
  44. ↑ "M 4.5 – 11 km SSW of Madison, Georgia". United States Geological Survey. Retrieved April 16, 2022.
  45. ↑ Wiser, Mike (March 22, 2011). "Quakes rare, but Iowa has shaken". IowaNews.com. Retrieved January 1, 2024.
  46. ↑ "Despite Lack of Headlines, Louisiana in Earthquake Zone". wafb.com. March 6, 2010. Retrieved April 18, 2022.
  47. ↑ "History of Maine Earthquakes". The Northeast States Emergency Consortium. Retrieved January 1, 2024.
  48. ↑ "Today in Earthquake History: August 10th". United States Geological Survey. Retrieved November 8, 2023.
  49. ↑ "NEBRASKA EARTHQUAKE HAZARDS". Shakeout.org. Retrieved April 16, 2022.
  50. ↑ Jochems, Andy; Love, Dave. "Earthquakes in New Mexico". New Mexico Bureau of Geology & Mineral Resources. Retrieved January 1, 2024.
  51. ↑ "M 5.2 – 3 km NNE of Royal Pines, North Carolina". United States Geological Survey. Retrieved April 16, 2022.
  52. ↑ Anderson, Fred J. "North Dakota Earthquake Catalog (1870-2015)" (PDF). Retrieved November 8, 2023.
  53. ↑ "Largest earthquakes in Ohio". ohiohistorycentral.org. Retrieved April 16, 2022.
  54. ↑ Heim, RJ (May 15, 2022). "The deeper long history of mostly minor earthquakes in Southern New England". Turnto10.com. NBC 10. Retrieved January 1, 2024.
  55. ↑ "Earth-shaking information about South Dakota earthquakes". keloland.com. June 18, 2021. Retrieved April 16, 2022.
  56. ↑ "History of Earthquakes in Vermont". The Northeast States Emergency Consortium. Retrieved January 1, 2024.
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