Influencing the San Andreas fault line at Parkfield. (Image: David Paul Morris/Getty)From New Scientist:
IT'S a kind of geological butterfly effect. Fenglin Niu of Rice University in Houston, Texas, and colleagues believe they have found two clear cases where remote events weakened the San Andreas fault near Parkfield, California. The finding suggests powerful earthquakes - like the one that has just hit Sumatra - may trigger further quakes worldwide.
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