Since Thursday, at least 131 earthquakes have been recorded — as small as magnitude 0.2 and as big as magnitude 4 — in the ...

Scientists link a magnitude 6.5 earthquake that shook Humboldt Bay, California, 71 years ago to the "locked" Cascadia ...

A series of moderate to minor earthquakes struck near the geologically active area in Northern California known as The ...

An earthquake swarm in Northern California early Thursday was another round of recurring temblors in a seismically active ...

Two earthquakes struck different parts of Northern California early Thursday morning, according to the U.S. Geological Survey ...

The recent earthquake is a reminder of the seismic volatility that characterizes the area near Eureka. The quake occurred in the vicinity of the Mendocino Triple Junction, a highly active seismic zone ...

More than 100 small earthquakes have been recorded near the Geysers geothermal field in Northern California since just after midnight Thursday, according to the U.S. Geological Survey.

What lies beneath Fickle Hill in northern California? Maybe the answer to an earthquake mystery that has puzzled seismologists for decades.The origin ...

The last “big one”-level moments in California’s recorded earthquake history were the 1857 quake in the central third of the San Andreas Fault and the 1906 earthquake in the northern third.

Repeated earthquakes in Northern California have residents wondering if they’re due for the next “big one.” At least two people died and 12 were injured after a 6.4-magnitude earthquake ...