Earthquake Monitoring
Across the United States

Every year, the USGS detects over 20,000 earthquakes across the United States. Most go unfelt — but when a major quake strikes without warning, the results are catastrophic. Alertra monitors seismic activity for 33,000+ ZIP codes using live USGS data, giving you the earliest possible alert.

Browse by State ↓ Search Your ZIP →
$14.7B
Average annual earthquake damage in the US (FEMA estimate)
143M
Americans living in areas with significant seismic risk
16
US states with M6.0+ earthquakes in recorded history

Seconds Matter.
Earthquakes Don't Wait.

Unlike hurricanes or wildfires, earthquakes provide zero advance warning. There is no "earthquake season." The ground simply moves — and in those first critical seconds, the difference between awareness and ignorance determines outcomes.

The 1994 Northridge earthquake struck at 4:30 AM on a holiday, killing 57 people and injuring 8,700 in a matter of seconds. It caused $20 billion in damage — making it the costliest natural disaster in US history at the time.

Alertra connects directly to the USGS real-time seismic network, delivering push notifications within 60 seconds of a verified rupture detection. Every second of early awareness is time to take cover, check on loved ones, and react.

Collapsed I-10 freeway interchange after the 1994 Northridge earthquake in California
1994 Northridge, CA — M6.7 collapsed freeway interchanges and killed 57 people. $20B in damage. Photo: FEMA / Robert A. Eplett
Building collapse in San Francisco Marina District after the 1989 Loma Prieta earthquake
1989 Loma Prieta, CA — M6.9 struck during the World Series, collapsing a section of the Bay Bridge. Photo: USGS / H.G. Wilshire
Fourth Avenue in Anchorage destroyed by the 1964 Great Alaska Earthquake
1964 Great Alaska Earthquake — M9.2, the most powerful earthquake ever recorded in North America. Photo: USGS

Earthquake Monitoring by State

Every US state has experienced earthquakes. Click any state to view live seismic data for its most active monitoring zone. Sorted by largest recorded magnitude.

M7.0+ M6.0+ M5.0+ M4.0+ Below 4.0
Showing all 51 states & territories
AK
Alaska
M9.2
Largest: M9.2 — Prince William Sound, 1964
Monitor: Anchorage, AK
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CA
California
M7.9
Largest: M7.9 — Fort Tejon, 1857
Monitor: Los Angeles, CA
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HI
Hawaii
M7.9
Largest: M7.9 — Ka'u District, 1868
Monitor: Hilo, HI
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MO
Missouri
M7.7
Largest: M7.7 — New Madrid, 1812
Monitor: Saint Louis, MO
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ID
Idaho
M7.3
Largest: M7.3 — Borah Peak, 1983
Monitor: Pocatello, ID
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MT
Montana
M7.3
Largest: M7.3 — Hebgen Lake, 1959
Monitor: Helena, MT
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SC
South Carolina
M7.3
Largest: M7.3 — Charleston, 1886
Monitor: Charleston, SC
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NV
Nevada
M7.1
Largest: M7.1 — Fairview Peak, 1954
Monitor: Las Vegas, NV
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WA
Washington
M7.1
Largest: M7.1 — Olympia, 1949
Monitor: Seattle, WA
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CO
Colorado
M6.6
Largest: M6.6 — Rocky Mountains, 1882
Monitor: Denver, CO
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UT
Utah
M6.6
Largest: M6.6 — Hansel Valley, 1934
Monitor: Salt Lake City, UT
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WY
Wyoming
M6.5
Largest: M6.5 — Hebgen Lake region, 1959
Monitor: Cheyenne, WY
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MA
Massachusetts
M6.2
Largest: M6.2 — Cape Ann, 1755
Monitor: Boston, MA
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OR
Oregon
M6.1
Largest: M6.1 — Scotts Mills, 1993
Monitor: Portland, OR
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NM
New Mexico
M5.8
Largest: M5.8 — Socorro, 1906
Monitor: Albuquerque, NM
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OK
Oklahoma
M5.8
Largest: M5.8 — Pawnee, 2016
Monitor: Oklahoma City, OK
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TX
Texas
M5.8
Largest: M5.8 — Valentine, 1931
Monitor: El Paso, TX
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VA
Virginia
M5.8
Largest: M5.8 — Mineral, 2011
Monitor: Richmond, VA
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AZ
Arizona
M5.6
Largest: M5.6 — Fredonia, 1959
Monitor: Phoenix, AZ
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TN
Tennessee
M5.5
Largest: M5.5 — Alcoa, 1973
Monitor: Nashville, TN
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IL
Illinois
M5.4
Largest: M5.4 — Southern Illinois, 1968
Monitor: Chicago, IL
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OH
Ohio
M5.4
Largest: M5.4 — Perry, 1986
Monitor: Columbus, OH
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KY
Kentucky
M5.2
Largest: M5.2 — Sharpsburg, 1980
Monitor: Louisville, KY
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NY
New York
M5.2
Largest: M5.2 — Massena, 1944
Monitor: New York, NY
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IN
Indiana
M5.1
Largest: M5.1 — Wabash Valley, 1909
Monitor: Indianapolis, IN
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NC
North Carolina
M5.1
Largest: M5.1 — Skyland, 1916
Monitor: Raleigh, NC
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AL
Alabama
M4.9
Largest: M4.9 — Irondale, 1916
Monitor: Huntsville, AL
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KS
Kansas
M4.9
Largest: M4.9 — Harper County, 2014
Monitor: Wichita, KS
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AR
Arkansas
M4.7
Largest: M4.7 — Heber Springs, 1969
Monitor: Little Rock, AR
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MN
Minnesota
M4.7
Largest: M4.7 — Staples, 1917
Monitor: Saint Paul, MN
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CT
Connecticut
M4.6
Largest: M4.6 — East Haddam, 1791
Monitor: Hartford, CT
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MI
Michigan
M4.6
Largest: M4.6 — Coldwater, 1947
Monitor: Detroit, MI
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NH
New Hampshire
M4.6
Largest: M4.6 — Ossipee, 1940
Monitor: Concord, NH
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PA
Pennsylvania
M4.6
Largest: M4.6 — Reading, 1994
Monitor: Philadelphia, PA
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ME
Maine
M4.5
Largest: M4.5 — Bar Harbor, 2006
Monitor: Portland, ME
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WV
West Virginia
M4.5
Largest: M4.5 — Near Elkins, 1969
Monitor: Charleston, WV
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GA
Georgia
M4.3
Largest: M4.3 — Near Augusta, 1914
Monitor: Atlanta, GA
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IA
Iowa
M4.3
Largest: M4.3 — Near Burlington, 2004
Monitor: Des Moines, IA
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ND
North Dakota
M4.3
Largest: M4.3 — Huff, 1968
Monitor: Bismarck, ND
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NE
Nebraska
M4.3
Largest: M4.3 — Near Lincoln, 1877
Monitor: Lincoln, NE
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LA
Louisiana
M4.2
Largest: M4.2 — Donaldsonville, 1930
Monitor: New Orleans, LA
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MS
Mississippi
M4.1
Largest: M4.1 — Charleston, 1931
Monitor: Jackson, MS
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VT
Vermont
M4.1
Largest: M4.1 — Near Middlebury, 1962
Monitor: Montpelier, VT
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NJ
New Jersey
M4.0
Largest: M4.0 — Asbury Park, 1927
Monitor: Newark, NJ
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SD
South Dakota
M4.0
Largest: M4.0 — Near Sioux Falls, 1911
Monitor: Sioux Falls, SD
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WI
Wisconsin
M4.0
Largest: M4.0 — Near Milwaukee, 1947
Monitor: Milwaukee, WI
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DE
Delaware
M3.8
Largest: M3.8 — Wilmington, 1871
Monitor: Dover, DE
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FL
Florida
M3.7
Largest: M3.7 — Gulf of Mexico, 2006
Monitor: Tallahassee, FL
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MD
Maryland
M3.7
Largest: M3.7 — Near Annapolis, 1993
Monitor: Baltimore, MD
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DC
District of Columbia
M3.6
Largest: M3.6 — Washington D.C., 1993
Monitor: Washington, DC
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RI
Rhode Island
M3.6
Largest: M3.6 — Kingston, 1951
Monitor: Providence, RI
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Don't wait to feel the shaking.

Alertra monitors USGS seismic data 24/7 and sends push notifications the moment an earthquake is detected near your ZIP code. No delays. No middleman.

Search Your ZIP Code