DANIEL HOUGHTON / THE SEATTLE TIMES
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Scientists: Silent tremors may foretell next Big One
ABOVE: Student Amanda Klaus, part of a University of Washington team studying "episodic tremor and slip" activity in the Port Angeles area, carries a box of earthquake-monitoring equipment. "This is the most exciting thing in seismology today," she says. BELOW: Tremor activity has dropped off lately, so the team will wait to install special batteries that power the ground sensors.
