The Alaska earthquake was reported two days after a 3.5-magnitude earthquake was reported in California on Tuesday (July 1), according to the United States Geological Survey. The earthquake was centered in Los Banos at a depth of 0.1 kilometers (about 0.06 miles).

The California earthquake was reported two days after a 3.8-magnitude earthquake was reported in Alaska last Sunday (June 29), according to the United States Geological Survey. The earthquake was centered in Nikolski at a depth of 10 kilometers (about 6.2 miles).

The Alaska earthquake was reported hours after a 4.6-magnitude earthquake was reported in California on June 28, according to the United States Geological Survey. The earthquake was centered at a depth of 11.6 kilometers (about 7.2 miles).

The California earthquake was reported hours after a 6.1-magnitude earthquake was reported in the Philippines on June 27, according to the United States Geological Survey. The earthquake was centered at a depth of 101.6 kilometers (about 63 miles).

The Philippines earthquake was reported two days after a 3.0-magnitude earthquake was reported in Alaska on June 25, according to the United States Geological Survey. The earthquake was centered at a depth of 109.9 kilometers (about 68 miles).

Try this out, then please--explain how it works?