The tectonic plates shift causing them to collide and shake the ground.
Southern California did not have any significant earthquakes in 1967. There was an earthquake in 1968 and 3 earthquakes in 1969 that did significant damage to southern California.
California
There are about 10,000 earthquakes every year
Earthquakes.
the titonic plates shift and move under the ocean which cause earthquakes and tsunamies
No. Earthquakes can cause landslides, but those are basically just scratching the surface. While will happen is that southern California will slowly move northward over the course of millions of years.
Earthquake swarm
Well earthquakes are unpredictable and cause because of shifting in plates places like California and Chili have lots of earthquakes because there on faltes.
All over the world. Like, California, Japan, and others because they sit on fault lines where the plates push against each other to cause earthquakes. Wherever a fault line is that country will most likely have tons of earthquakes over the years.
Tectonic underground plates going over each other
A La Nina climate pattern is associated with drier than normal conditions in Southern California.
The main cause of earthquakes is when there is a sudden movement of various plate boundaries or when plates scrape against each other. Some earthquakes are also caused from old plate boundaries or faults. Many earthquakes happen at faults, such as the San Andreas Fault in California.