Step-by-step explanation:
Earthquakes occur when the tectonic plates start moving back and forth, causing a friction. When this happens, the ground will start to shake, and can cause buildings to be damaged or destroyed. They occur because the tectonic plates shift back and forth, causing the ground to shake.
The earthquakes happen mostly in California because the plates are located in the Pacific Ocean. However, they can also happen other places too. I HOPE THIS HELPS YOU!!!!!!!!!!!