Atlantic Ocean earthquake from 2016 confirmed as rare 'boomerang' quake

Scientists tracked a "boomerang" earthquake in the ocean for the first time, along the Romanche fracture zone under the Atlantic Ocean. Such earthquakes tend to reverse course instead of going in one direction. The magnitude 7.1 earthquake was recorded in 2016. The rupture initially travelled upward and eastward before turning back west at "incredible speeds", breaking the "seismic sound barrier".