Rare “boomerang” earthquake detected under the Atlantic Ocean for the first time – CBS News

For years, scientists have been attempting to track an extremely rare “boomerang” earthquake. Now, they’ve recorded one in the ocean for the first time — and it’s even more bizarre than they expected. 
Earthquakes are the result of rocks breaking on a fault, which is a boundary between two plates. A “boomerang” earthquake, also known as a “back-propagating supershear rupture,” means the fracture travels away from the initial crack before returning to it at even faster speeds, scientists said. 
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