It occurred at 11:42 am PDT and caused structural damage to buildings, including to St. Jude Centers for Rehabilitation and Wellness and to the Pomona City Hall.

Water mains were ruptured in limited areas of Los Angeles, and superficial damage was done to the facades of businesses and other buildings.

Many businesses, including Wal-Mart, reported damage to merchandise which was knocked to the floor and South Coast Plaza in Costa Mesa suffered damage to a portion of the ceiling which was knocked to the chair of a restaurant.

[5] The cliff swallows of Mission San Juan Capistrano nest in Chino Hills.

Thousands of the small birds, up from 'wintering' in Argentina, have built their mud nests in the eaves of the Vellano Country Club, a community situated around a golf course in the hills.