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Seismologists have recorded 3,000 earthquakes in California since the 6.9-magnitude quake of July 4

California has been rocked by 3,000 minor tremors since the 7.1-magnitude earthquake on July 5 - and scientists have said its cause was 'complex'.  The area near Ridgecrest in southern California was hit by a 6.4-magnitude earthquake a day before, and since then there have been 340 quakes stronger than a magnitude of 3.  Seismologists believe there are more to come - with more than 30,000 tremors predicted above magnitude 1 in the coming weeks, reports Science Alert.  Read more....



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