Earthquake Causes Tsunami. Energy accumulates in the overriding plate until it exceeds the frictional forces between the two stuck plates. When this happens, the overriding plate snaps back into an unrestrained position. This sudden motion is the cause of the tsunami - because it gives an enormous shove to the overlying water.
Ajo is in the Sonoran Desert, tucked away in Western Pima County in Arizona, about 120 miles southwest of Phoenix and 130 miles west of Tucson.
Douglas is a city in Cochise County, Arizona, United States that lies in the north-west to south-east running San Bernardino Valley within which runs the Rio San Bernardino. Douglas has a border crossing with Mexico at Agua Prieta and a history of mining. The population was 17,378 at the 2010 census.