Valley News -

By Diane Sieker
Writer 

Cahuilla Swarm rattles residents

 

Last updated 9/7/2018 at 6:14pm

Courtesy

These detailed spatial and temporal evolution of the 2016-2018 Cahuilla Swarm is from data from the Caltech and U.S. Geological Survey's Southern California Seismic Network.

Many months of unusually frequent earthquake activity has left residents of the Anza Valley wondering what it all means. The temblors have ranged in magnitude of less than one to a shake of magnitude 4.4. Hundreds of quakes a week have been recorded by scientists.

According to the United States Geological Survey, "An earthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called the fault or fault plane. The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above i...



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