A 4.2 magnitude earthquake shook northern Lake County on Sunday night, with tremors felt in parts of Mendocino County, ...

Non-volcanic tremor ramp up precedes slow slip in Cascadia by about a day, indicating that brittle-creeping process ...

An earthquake in Lake County Sunday evening was felt in parts of Sonoma and Mendocino counties. According to the United States Geological Survey (USGS), a 4.2 magnitude earthquake ...

The last big, “megathrust” earthquake in the region, along the 600-mile-long Cascadia Subduction Zone, was in 1700. Experts say the likelihood in the next 50 years of a “megathrust” on the ...

The 4.5 magnitude earthquake originated at 5:02 a.m. 10 kilometers east of Orcas and was felt as far north as Vancouver and as far south as Seattle, according to an estimated shake map from the U.S.

A second earthquake of at least 2.5 magnitude in 12 hours struck Thursday afternoon in western Washington. The 3.2 magnitude earthquake was recorded about 4.5 miles northeast of Fall City in east King ...

This earthquake comes just hours after a 2.8 magnitude struck in Bremerton early on Thursday morning. The initial shake map from the Pacific ... This is called the Cascadia Subduction Zone.

This is called the Cascadia Subduction Zone. According to the Washington State Department of Natural Resources (DNR), earthquakes happen in Washington every day, but most are too small to be felt.

A preliminary earthquake measuring 3.5 on the Richter ... The quake is a reminder of the seismic activity in the region, where the Cascadia Subduction Zone has been known to produce periodic ...