How did the tsunami happen in San Andreas?

How did the tsunami happen in San Andreas? Local tsunamis might be generated along the California coast, if the shaking from an earthquake on the San Andreas fault triggers underwater landslides or if there is slip on a smaller offshore fault.

Local tsunamis might be generated along the California coast, if the shaking from an earthquake on the San Andreas fault triggers underwater landslides or if there is slip on a smaller offshore fault.