QUAKIN' ALL OVER.

Authors :: O'Hanlon, Larry
Source :: New Scientist. 04/07/2001, Vol. 170 Issue 2285, p30. 4p. 4 Color Photographs.
Publication Year :: 2001
Abstract: Reports on evidence that double earthquakes, those that hit the epicenter and another location, can be caused by ruptures in faults which act as earthquake magnifiers. Mention of an earthquake in Northridge, California, which also hit Santa Monica, 21 kilometers away; Description of how seismic waves travel and refract; Efforts of seismologists to identify deep sediment basins to identify areas at risk.