More than a million tiny earthquakes revealed in Southern California - Science News

1. More than a million tiny earthquakes revealed in Southern California  Science News
2. Southern California hit by tiny earthquakes every 3 minutes, study finds  KABC-TV
3. Detecting Tiny Earthquakes In Southern California  NPR
4. Hidden Earthquakes in Southern California  caltech
5. Southern California tickled by tiny tremors every 3 minutes  Fresno Bee
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