Shaking Felt News Today

A 4.2-magnitude earthquake struck San Diego County, according to the U.S. Geological Survey, with shaking felt in Orange County and the Inland Empire.

A pair of massive earthquakes rocking southern california back-to-back days, sparking fires, rattling homes and stores as many caught in the violent shaking ran to escape. >> my daughter said it wont stop trembling. >> first came the magnitude 6.4 followed by an even more powerful 7.1 earthquake. if the epicenter near the city of ridgecrest. the shaking felt from los angeles to as far north as sacramento from as far east as phoenix, and to the south in mexico. its the strongest seismic activity ...

>> so explain what you mean by that. >> the earthquakes when they are this big, magnitude 8 and theyre shallow, the surface waves they create have a very long period. theyre very large. they are the ones that cause the shaking, the damage. the smaller aftershocks, they have a lot more higher frequency. and so, you know, it takes a bit more work to find them in that coda. >> sure. so if im understanding you correctly, thats not to say theyre not taking place. its just is that you havent detected ...