HUMBOLDT COUNTY, CA - the U.S. Geological Survey reported that a preliminary 3.4 magnitude quake occurred near Petrolia Saturday morning.

A 4.9-magnitude earthquake and several aftershocks rattled the Inland Empire on Monday night, according to the United States Geological Survey.

More than 70 percent of Californians live within 30 miles of a major fault.

A 4.9 earthquake was recorded about 5.4 miles northeast of Indio Hills, according to USGS. INDIO HILLS, Calif. — People across San Diego County reported feeling an earthquake Monday evening. USGS reported a 4.9 magnitude earthquake northeast of Indio Hills in Riverside County at 5:56 p.m.

California Earthquake 2026 explains what happened, where the quake was felt, aftershocks, risks, and how residents can prepare for future earthquakes.

USGS has reported several aftershocks in the area.

By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San Andreas fault meets the Cascadia subduction zone, an area that could give rise to devastating major earthquakes.

Scientists uncover hidden faults beneath Northern California’s Mendocino triple junction. The discovery reshapes understanding of earthquake hazards and tectonic activity.

It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, sparking concerns that we could be drastically underestimating the earthquake risk in the region,