How much warning do we have before an earthquake strikes?
What causes an earthquake?\xa0What do volcanoes and earthquakes have in common? What should you do if you suddenly find yourself in an earthquake? For free home activities sign-up at www.WhoSmarted.com\nSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.