How Often Do Earthquakes Happen in California?
Last Updated Apr 15, 2020 1:39:58 PM ET

Scientists estimate that over 10,000 earthquakes occur in California each year. Most of these go unnoticed since they are minor. For example, only several hundred have a magnitude greater than 3.0 and of these,only 15 to 30 have a magnitude in excess of 4.0.
Research conducted by the U.S. Geological Survey in 2008 reported that California can expect an earthquake of 6.7 magnitude or greater once every 6.7 years. The southern portion of the San Andreas system of faults is of particular concern to geologists who feel this to be the site of the next major quake that they consider a certainty within the next 20 years.
More From Reference

What Features Does Infinite Campus Offer for Students?

Stay Up-to-Date in 2021 With These Custom Photo Calendar Ideas

How to Change Your Mailing Address Online

10 Must-Watch TED Talks That Have the Power to Change Your Life

Strange Americana: Does Video Footage of Bigfoot Really Exist?

How the COVID-19 Pandemic Will Change In-Person Retail Shopping in Lasting Ways