About Earthquake Activity in United States
United States experiences very high (west coast & alaska) seismic activity, primarily governed by its tectonic setting: Pacific Plate sliding past North American Plate along San Andreas; Juan de Fuca subducting along Cascadia; Pacific subduction along the Aleutian Trench. Historically, the 1964 Great Alaska (Prince William Sound) earthquake (M9.2) demonstrated the region's immense seismic hazard potential.Major geological fault structures include San Andreas Fault System, Cascadia Subduction Zone, Aleutian Megathrust, Hayward Fault, New Madrid Seismic Zone. This page provides continuous, verified seismic telemetry sourced directly from the U.S. Geological Survey (USGS) and the European-Mediterranean Seismological Centre (EMSC).
Earthquakes Today in United States — Live USGS & EMSC Tracker
Was there an earthquake in United States today? Yes — in the past 24 hours, our live Today's Earthquakes tracker recorded 19 verified earthquakes in and around United States. Our real-time seismic monitor detects and maps every tremor instantly using continuous sensor telemetry from the USGS and EMSC. If you just felt shaking and want to confirm it, the interactive map above displays exact epicenter coordinates, focal depth, magnitude, and distance from nearby cities. In the last 30 days alone, United States recorded 1,037 earthquakes, with 196 in the past 7 days. With an exposed population of approximately 335 million, timely seismic tracking is crucial for emergency awareness.
Why Does United States Experience Earthquakes?
Seismic activity in United States is fundamentally driven by its tectonic setting: Pacific Plate sliding past North American Plate along San Andreas; Juan de Fuca subducting along Cascadia; Pacific subduction along the Aleutian Trench. As tectonic plates continuously converge, slide past one another, or diverge, frictional forces along fault planes lock the crust until the strain exceeds rock strength. When a fault suddenly slips, stored elastic energy is released as seismic waves that radiate outward, causing the ground motion recorded on seismographs.
Key Facts About United States Seismicity
- Seismic Risk: Very High (West Coast & Alaska)
- Major Faults: San Andreas Fault System, Cascadia Subduction Zone, Aleutian Megathrust, Hayward Fault, New Madrid Seismic Zone
- Tectonic Setting: Pacific Plate sliding past North American Plate along San Andreas; Juan de Fuca subducting along Cascadia; Pacific subduction along the Aleutian Trench
- Notable Historical Quakes: 1964 Great Alaska (Prince William Sound) (M9.2), 1906 San Francisco (M7.9), 1989 Loma Prieta (M6.9), 1994 Northridge (M6.7)
- Population Exposed: 335 million
Earthquake Magnitude & Impact Reference
Staying Safe During an Earthquake in United States
If you feel sudden shaking in United States, remember the official safety protocol: Drop, Cover, and Hold On. Take cover under a sturdy table, shield your head and neck, and hold on until ground shaking completely subsides. Afterwards, check for gas leaks, stay alert for aftershocks, and review our step-by-step earthquake survival guide .
Explore other regions on our global countries directory, check our earthquake near me radar, set up instant seismic alerts, or read our scientific breakdown on why earthquakes happen.