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San Andreas Fault weakened by Sumatran quake

US seismologists say the 2004 earthquake that triggered tsunamis throughout the Indian Ocean weakened California’s San Andreas Fault, suggesting that large earthquakes can weaken fault zones worldwide and may trigger periods of increased global seismic activity. “An unusually high number of magnitude 8 earthquakes occurred worldwide in 2005 and 2006,” said study co-author Fenglin Niu, […]

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