Magnitude 4.7 earthquake is Monday morning's shake-up call.

 
Monday morning's magnitude 4.7 earthquake in Riverside County was the largest temblor to hit the Los Angeles region in three years and has produced more than 100 aftershocks.


It caused no major damage, but it was felt over what seismologists said was an unusually large area.
The quake was initially recorded as three separate temblors because a foreshock tricked seismograms into recording multiple quakes of multiple sizes, said Susan Hough, a USGS seismologist.

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Earthquakes of a 4.7 magnitude are typically felt only about 120 miles away from the epicenter, but Monday morning's quake traveled farther, shaking coffee cups as far as Los Angeles.


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 Weather seismic resonance 12 - March 31, 2013. Prediction.