When an earthquake struck San Diego, these elephants formed an 'alert circle'
When a 5.2 earthquake hit near San Diego yesterday, the San Diego Zoo Safari Park caught its elephants on video taking action to protect their young, forming what experts call an "alert circle."


When a 5.2 earthquake hit near San Diego yesterday, the San Diego Zoo Safari Park caught its elephants on video taking action to protect their young, forming what experts call an "alert circle."
(Image credit: Ken Bohn)