EUREKA (CBS SF) — A earthquake registering a preliminary magnitude of 4.3 struck off the coast of Eureka, California, according to the U.S. Geological Survey’s automated seismograph alert network.
The quake struck an estimated depth of 6 miles below the earth’s surface at approximately 6:40 p.m. Deeper quakes are less noticeable while a shallow quake–in the 0 to 40 mile depth range–can feel much stronger than their actual reported magnitude. Quakes just below the earth’s surface, in the 0 to 10 miles range, can cause even more damage at lower magnitudes.
COMPLETE QUAKE COVERAGE:CBS Earthquake Resource Center
View original post 44 more words