Stormquakes: Powerful storms cause seafloor tremors

phys.org | 10/15/2019 | Staff
MicaellaMicaella (Posted by) Level 3
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Stormquakes are a recently discovered phenomenon characterized by seismic activity originating at the ocean floor due to powerful storms.

Catherine de Groot-Hedlin, a researcher at the Scripps Institution of Oceanography at the University of California, San Diego, was part of the group that first observed stormquakes. She will discuss their properties and meteorological significance during a session at the 178th Meeting of the Acoustical Society of America, which will take place Dec. 2-6, at the Hotel del Coronado in San Diego.

Talk - Stormquakes - Path - Storms - Earth

The talk, "Stormquakes: Tracing the path of ocean storms through the solid earth," will be presented on Friday, Dec. 6, as part of the session on marine seismoacoustics.

Heavy storms, like hurricanes or nor'easters, can create seismic waves as large as magnitude 3.5 quakes. These tremors caused by the effects of storms on the seafloor are what de Groot-Hedlin and her collaborators call stormquakes. An equivalent earthquake would be large enough to generate noticeable indoor shaking.

Track - Storm - Depth - Ocean - Location

The track of the storm and the depth of the ocean at its location are key factors in determining whether a stormquake occurs.

"Most hurricanes we studied were strong as they passed...
(Excerpt) Read more at: phys.org
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