A magnitude 6.1 earthquake struck the Bering Sea at a depth of 45km on Monday, the National Center for Seismology said. The region lies along the seismically active Pacific “Ring of Fire”, where tectonic plate movements frequently trigger powerful earthquakes. A magnitude 6.1 earthquake struck the Bering Sea at a depth of 45km on Monday, the National Center for Seismology said. The region lies along the seismically active Pacific “Ring of Fire”, where tectonic plate movements frequently trigger powerful earthquakes.