The Alaska earthquake struck hours after a 4.6-magnitude earthquake was reported in New Mexico on Tuesday (February 18), according to the United States Geological Survey. The earthquake was centered in Whites City at a depth of 6.5 kilometers (about 4.0 miles).

The New Mexico earthquake struck hours after a 4.8-magnitude earthquake was reported in Portugal on Monday (February 17), according to the United States Geological Survey. The earthquake was centered in Charneca de Caparica at a depth of 10 kilometers (about 6.2 miles).

The Portugal earthquake was reported days after a 3.7-magnitude earthquake was reported in California last Thursday (February 13), according to the United States Geological Survey. The earthquake was centered in Hayward, near the San Francisco area, at a depth of 7.0 kilometers (about 4.3 miles).

The Hayward earthquake was reported hours after a 3.3-magnitude earthquake was reported in California, according to the United States Geological Survey. The earthquake was centered in Petroila at a depth of 7.2 kilometers (about 4.5 miles).

Thursday's earthquake struck hours after a 4.5-magnitude earthquake was reported in Petrolia on February 12, according to the United States Geological Survey. The earthquake was centered in Petroila at a depth of 10 kilometers (about 6.2 miles).

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