A 6.0 magnitude earthquake hit at about 12:20pm Feb. 4, 2010, 34.7 miles West-Northwest of the Petrolia California shore, at a depth of about about 6.9 miles.

The rolling & shaking quake was felt for about 15 seconds in Petrolia, and as far as 275 miles away in San Francisco CA, . People in Eureka CA felt some shaking, but reported no damage around town. Additionally, no injuries have yet been reported as a result of the quake.

Earthquakes with a magnitude between 6.0 and 6.9 on the Richter scale are considered to be “strong” and can be destructive in areas up to 100 miles across in populated areas.

“The magnitude is such that a tsunami is not expected,” the West Coast and Alaska Tsunami Warning Center said in a bulletin.

The earthquake originated in the area of the Mendocino Triple Junction, one of the most seismically active regions of the San Andreas transform system.