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Mysterious Boom Update: Scientists say it was a sound wave that traveled over the ocean to desert

Scripps scientists say it traveled over the ocean to desert
By Alex Roth
UNION-TRIBUNE STAFF WRITER
April 27, 2006

A group of local scientists has uncovered some clues to the source of a mysterious disturbance that rattled San Diego County on the morning of April 4, shaking windows, doors and bookcases from the coast to the mountains.

The scientists, based at Scripps Institution of Oceanography in La Jolla, say the disturbance was caused by a sound wave that started over the ocean and petered out over the Imperial County desert. Using data from more than two dozen seismometers, they traced its likely origin to a spot roughly 120 miles off the San Diego coast.

http://www.signonsandiego.com/uniontrib/20060427/images/boom.gif

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