Seventy-five years ago on April 18, 1906, the most devastating earthquake in United States history occurred in northern California. This earthquake, which occurred at 5:2 in the morning just as the dawn was breaking, came from rupture of the San Andreas fault from San Juan Bautista (near Hollister) northqard for 270 miles to the coast near Eureka. Buildings were damaged everywhere in this region, for a north-south distance of 370 miles, from Arcata to Salinas, and an east-west width of 50 miles inland from the coast. The larger cities of San Francisco, Sna Jose, and Santa Rosa suffered the msot severe damage.