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Hurricane Sandy lit up seismometers across US
Hurricane Sandy’s fateful left turn toward the mid-Atlantic Coast in October last year lit up earthquake monitors all the way to Seattle, according to results presented at the Seismological Society of America’s annual meeting Thursday.
When Hurricane Sandy veered on Oct. 29, the sudden increase in crashing ocean waves sent rumbles through the Earth detectable on seismometers. The wave-on-wave collisions created what are called standing waves, doubling the energy directed at the seafloor, scientists reported today. The ocean gave the seafloor a little shove, sending seismic waves through the Earth.
The tremors are roughly similar to a magnitude-2 or magnitude-3 earthquake, but have a unique signal on seismometers, distinct from the rapid shaking caused by earthquakes, said Oner Sufri, lead study author and a geophysics doctoral student at the University of Utah. [Watch Sandy shake the U.S.]
Hurricane Sandy’s tremors, called microseisms, were detected by Earthscope, a traveling array of about 500 portable seismometers that are tracing a roughly rectangular swath across the United States.
More: http://science.nbcnews.com/_news/2013/04…ss-us?lite
2013-04-18 16:45:11
Source: http://yeoldefalseflag.com/thread-hurricane-sandy-lit-up-seismometers-across-us
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