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Late night quake shakes the county

  • by Andy Geisel
  • in News
  • — 19 Jul, 2010

Mono County residents may have felt some shaking during the late hours of Saturday night, caused by a magnitude-3.5 earthquake that rattled the area. The shaking lasted roughly 5-10 seconds, and was classified by the U.S. Geological Survey as a Type II-III, or “Weak” quake, but it still got the attention of a few locals. At least 30 reports were called or e-mailed into the U.S.G.S. website by Sunday.

According the U.S.G.S., the epicenter was located approximately 10 miles east-southeast of Mammoth Lakes. The quake struck at 11:16:26 p.m. local time, at a depth of 7.8 kilometers or 4.8 miles.

Another smaller quake, this one a magnitude-1.2, occurred a few minutes later at 11:54:11 p.m. This one, however, was located 12 miles north of Mammoth Lakes, at a depth of 3.1 kilometers or 1.9 miles.

No reports of injuries or damage accompanied the U.S.G.S. report.

A 1.5-magnitude quake that may or may not have been an aftershock occurred at 11:59:27 a.m. on Sunday. That event, located 15 miles south-southeast of Mammoth Lakes, lasted just 3 seconds, at a depth of 6.2 kilometers or 3.9 miles.

It’s unclear whether the two smaller events were aftershocks related to the Saturday night quake, as numerous small quakes are typical in this region of California.

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Topics: mammothsheet

— Andy Geisel

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