Earthquakes in United States Today
American seismicity comes from four unrelated settings: the San Andreas transform slicing through California, the locked Cascadia subduction zone off the Pacific Northwest, the Aleutian arc that makes Alaska the most earthquake-prone state, and the Hawaiian hotspot where magma movement and flank collapse drive the shaking.
Danger Level (72h)
72-hour composite hazard forecast
Recent Quakes (30d)
Recorded in the last 30 days
Max Magnitude (30d)
Largest earthquake in the last 30 days
Recent earthquakes
Counts cover the seismic belts this platform monitors in United States, not its administrative borders. A monitored belt can reach across a border, and events there are listed with the country of their epicentre.
Volcanoes of United States
3 dedicated profiles · 165 Holocene volcanoes in total
Tectonic setting
American seismicity comes from four unrelated settings: the San Andreas transform slicing through California, the locked Cascadia subduction zone off the Pacific Northwest, the Aleutian arc that makes Alaska the most earthquake-prone state, and the Hawaiian hotspot where magma movement and flank collapse drive the shaking.
Frequently asked questions
What is the emergency number in United States?
The emergency number in United States is 911, answered by FEMA / local emergency services. After strong shaking, keep the line free for those trapped or injured and check official channels for aftershock and tsunami advisories.
Who monitors earthquakes in United States?
The national seismic authority is United States Geological Survey, Advanced National Seismic System (USGS / ANSS). EarthquakeLive cross-checks its bulletins against 18 international networks, so an event may appear here with a slightly different magnitude until the agencies converge on a final solution.