While seismic activity is not uncommon in the state, experts believe the frequency at which they’re happening is unusual.

Approximately 10 to 15 earthquakes are recorded annually, according to the state’s emergency management division.

LOS ANGELES – For more than a month, the San Francisco Bay Area has been subjected to a seemingly ceaseless stampede of earthquakes – the latest in a series of seismic swarms that have rattled windows ...

A megathrust earthquake is coming for the Pacific Northwest. But new imaging of undersea faults and fractures has given ...

SO OVER THE NEXT 12 HOURS, WE’LL SEE TEMPERATURES DIP DOWN TO AROUND 60 DEGREES, PERHAPS OVER THE PAST COUPLE OF DAYS YOU’VE NOTICED MAYBE A RUMBLE OF THUNDER, BUT IT’S NOT RAINING OR ANYTHING OUTSIDE ...

After more than 300 years of quiet, the Cascadia Subduction Zone is on the verge of releasing immense energy. This underwater fault along the Pacific coast is something scientists are keeping a close ...

MISSOURI — When most people think of earthquakes, they think of California fault lines. But the most active earthquake zone east of the Rocky Mountains runs straight through the middle of the country ...

The Mexican state of Guerrero in the southern part of the country was struck by a 6.5 magnitude earthquake Friday Jan. 2, according to the United States Geological Survey. Mexico's President Claudia ...