California in on a plate boundary where the Pacific plate and the North American plate are moving along side each other.
About 90% of the world's earthquakes and 80% of the world's largest earthquakes occur along the Ring of Fire.
they are making earthquakes
earthquakes
Earthquakes
fault
sliding up next to each other causing earthquakes
If the fault is responsible for the earthquake, there will be movement (displacement) along the fault.
Arizona does have earthquakes, just not to the degree that California does. The fact that California has an incredible number of faults and is located along a plate boundary is the biggest contributor to their number and magnitude.
Earthquakes result when forces push plates along faults in the Earth's lithosphere. These plates are comprised of the crust and a portion of the upper mantle.
Scientists have no power to control earthquakes, nor to specifically predict them, but a logical area that the earthquakes would take place is along the plates of the earths crust. (Their shifting leads to earthquakes)
earthquakes along the San Andreas fault in California
Actually i found the answer. A lot of earths plates are found there and they rub against each other a causing earthquakes.