A 6.7-magnitude earthquake struck Russia’s Kuril Islands on Sunday, following a series of aftershocks since the record 8.7 quake on July 30. No tsunami alert has been issued. Authorities remain on alert as seismic activity continues in the region.

A powerful earthquake that struck off the coast of Russia has generated tsunami warnings and advisories for a broad section of the Pacific, including Alaska, Hawaii and the U.S. West Coast

An 8.8-magnitude earthquake struck off Russia’s eastern coast on late Wednesday morning, local time. The quake triggered tsunami waves across the Pacific that hit Russia, Japan, Canada and parts of the US coast.