California has dozens of earthquakes every day. Most are below 3.0 magnitude, so small that they aren’t felt.

This spectrogram shows four hours of USGS Hawaiian Volcano Observatory data streams across six seismic stations at Kilauea’s ...

Kīlauea has been erupting episodically within the summit caldera since Dec. 23, 2024. Its USGS Volcano Alert level is WATCH.

PENSACOLA, Fla. -- The United States Geographical Survey reported an earthquake at a magnitude of 3.1 in the Gulf on Friday ...