A swarm of 1,000 earthquakes hit Southern California — how nervous should we be? Written on June 20, 2019. Posted in Uncategorized. This content is restricted to site members. If you are an existing user, please log in. New users may register below.Existing Users Log InUsername or EmailPassword Remember Me New User RegistrationChoose a Username*First Name*Last Name*Email*PasswordConfirm Password*Required field Previous Next