A 5.6-magnitude earthquake was reported in Alaska on Sunday (December 22), according to the United States Geological Survey.
The earthquake was centered in Akhiok at a depth of 9.2 kilometers (about 5.7 miles). The USGS said it received two reports of people having felt the earthquake at the time of publication.
The Alaska earthquake was reported four days after a 3.7-magnitude earthquake was reported in California on Wednesday (December 18), according to the United States Geological Survey. The earthquake was centered in Petrolia at a depth of 5.3 kilometers (about 3.3 miles).
Several earthquakes have been reported in Petrolia in recent weeks, most notably a 7.0-magnitude earthquake on December 5, according to the United States Geological Survey. The earthquake was centered in Petrolia at a depth of 0.6 kilometers (about 0.37 miles).
A tsunami warning was issued for the San Francisco Bay Area by the National Weather Service following the earthquake report. “Evacuation is recommended. Move to high ground or inland,” the weather service’s advisory system reads," NWS said via the New York Post.
The USGS also reported a 2.5-magnitude earthquake in French Gulf, California, and a 2.5-magnitude earthquake in Cobb, California, at the same time as the 7.0-magnitude Petrolia earthquake.
A 7.3-magnitude earthquake was reported in Vanuatu on December 17, according to the United States Geological Survey. The earthquake was centered in Port-Vila at a depth of 57.1 kilometers (about 35.5 miles).