Earthquakes occur daily in California but many of them are not strong enough to be measured on the Richter scale. The reason for so many warthquakes in California is the fact it is situated on a a fault line.
Minor earthquakes below a Richter scale of 3.0 occur somewhere in the state several times a year. Large earthquakes above 5.0 occur about once a year within the state. Earthquakes over 6.0 occur every few years.
