10 aftershocks followed 4.0 earthquake in O.C., officials say
The latest temblor, which was too small to feel, happened about 7:30 a.m., about 11 hours after the 4.0-magnitude quake hit, said Bob Dollar, a geophysicist with the U.S. Geological Survey. Most of the aftershocks occurred within about an hour of the 4.0 quake, the largest being two 2.4-magnitude temblors that were about two miles north and north-northwest of Yorba Linda.
The first quake was felt over a wide area of Los Angeles and Orange counties, Dollar said, with more than 8,000 people reporting to the USGS's "Did you feel it?" page.
"We haven't had a 4 in the urban area for a while," Dollar said. "And a 4 is strong enough that it's going to be widely felt."
The earthquake also added a little extra excitement to the star-studded red-carpet opening of the new Cars Land at the Disneyland Resort, where thousands of celebrities, media and other invite-only guests gathered at California Adventure for an event celebrating the final piece of a $1.1-billion expansion of the Anaheim park.
"Earthquake!" @Mouseinfo tweeted. "I guess mother nature wanted to get into #carsland too."
No damage was immediately reported after the earthquake or the aftershocks that followed, Orange County officials said.
-- Kate Mather, Kimi Yoshino and Robert J. Lopez
Image: A map shows the area where quakes were reported Wednesday night and Thursday morning. Credit: U.S. Geological Survey