Gut Check: Will California be ready for the big one?

After a 5.1 earthquake hit Southern California on Friday, many are wondering when the next one will be

March 31, 2014, 12:15 PM UTC / Updated March 31, 2014, 12:15 PM UTC

By MSNBC staff, MSNBC staff

After a 5.1 earthquake hit Southern California on Friday, many are wondering when the next one will be.