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Scientists say Monday’s magnitude 4.4 earthquake in Southern California, and last week’s quakes near the North Coast were simply business as usual in seismically-active California.

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“The pattern that we’re seeing now is no different than what we had two or three weeks ago,” said Dr. Gerald Bawden, a geophysicist with the US Geological Survey in Sacramento.  “It just happened to be some were a little bit larger…or happened to be a little bit shallower.”

A larger concern than the recent quake activity, is the lack of activity on major fault lines that have been quiet for many years.

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According to Dr. Bawden, a magnitude 6.5 or larger quake is likely on the Hayward fault in the Bay Area within the next 25 years.

“One standard deviation says 65 percent chance,” Dr. Bawden said.