Licenciada

Arizona

Earthquake History
The earliest documents which describe Arizona earthquakes were those recorded at Fort Yuma, located in the 1800's on the California side of the Colorado River. Shockswhich probably centered in the Imperial Valley of California, or in Mexico, have been noted there since late 1852.
No earthquake in recorded history has caused deaths or injuries in Arizona. In thepast century or more, 14 tremors of intensity V to VII have centered within its borders, of which 12 were reported after Arizona entered the Union in February 1912. All of these shocks, however, weremoderate in intensity, with one intensity VII, one VI-VII, four VI, and eight V.
Probably the most famous earthquake in this region occurred in 1887 near Bavispe, Mexico, about 190 miles southeast ofTucson. The temblor caused great destruction near its epicenter. From Guaymas to Nogales, Mexico, Benson and Tucson, Arizona, and at towns as far distant as Albuquerque, New Mexico, water in tanksspilled over, buildings cracked, chimneys were toppled, and railroad cars were set in motion. An observer at Tombstone, near the Mexican border, reported sounds ``like prolonged artillery fire.''
Thefirst damaging earthquake known to have centered within Arizona's borders occurred on January 25, 1906, the year of the great San Francisco earthquake, and of a damaging series of shocks at Socorro, NewMexico. The shock was violent at Flagstaff, about 115 miles north of Phoenix.
The cumulative terror produced by a series of 52 earthquakes, from September 10 to 23, 1910, caused a construction crewin the Coconino Forest near Flagstaff to break camp and leave the area. Boulders rolled down on their camp from nearby mountains, and the earth maintained a constant quiver. The shocks grew inintensity until September 23, when a very strong shock raged throughout northern Arizona. It was so severe north of the San Francisco Mountains that Indians fled from the region.
A tremor on August 18,...