Earthquakes’ sudden, rapid shaking can cause fires, tsunamis, landslides or avalanches. They can happen anywhere, but they’re most common in Alaska, California, Hawaii, Oregon, Puerto Rico and Washington, according to the Department of Homeland Security.

A magnitude 4.1 earthquake struck off the Northern California coast after midnight on Tuesday, the U.S. Geological Survey said. Several smaller quakes followed.

A preliminary 4.1 magnitude earthquake struck off the coast of Northern California early Tuesday morning, according to the United States Geological Survey.