In Japan, swarms of earthquakes are fueling a dip in tourism and a viral panic over predictions of the next 'big one' ...

California was hit by multiple earthquakes on Wednesday, just days after a major 5.2 magnitude quake rocked the state.

A minor, 3.7-magnitude earthquake struck in Southern California on Thursday. It was followed by a larger, 4.3-magnitude quake ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009 ...

SEATTLE (AP) — Officials are tracking the largest swarm of earthquakes in more than 15 years on Washington's Mount Rainier ...

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano ...

(A Swarm Of Earthquakes)....It started last night.

CALIPATRIA– A 4.3-magnitude earthquake struck near the Salton Sea early Friday morning, jolting residents and triggering a series of smaller quakes in the seismically active region. The temblor, cente ...

About 5% to 10% of all California earthquakes are followed by a larger one within a week, and the probability of a larger quake depends on how much aftershock activity there is, according to the USGS.