Scientists blame delayed aftershock from 7.1-magnitude Hector Mine tremblor in 1999 that derailed the Amtrak Southwest Chief.Associated Press
Los Angeles Times
LUDLOW, California - A moderate earthquake struck a sparsely populated area of California's Mojave Desert on Friday night. The shaking was felt from Los Angeles to San Diego, to the fringes of Nevada and Arizona, but there were no immediate reports of damage.
The 5.1-magnitude temblor struck at 8:18 p.m. just outside Ludlow on Interstate 40 in San Bernardino County, just east of Barstow and about 120 miles east of Los Angeles, the U.S. Geological Survey said. The initial reports measured the quake at 5.5 magnitude.
"The ground was rolling underneath but it was very light. Nothing," said Jeremy Chestnut, 20, who works at a Dairy Queen in Ludlow. "I was standing in front of an ice cream machine and it makes the ground shake, too."
The quake is the second one above a magnitude-5.0 to hit Southern California this year. In July, a magnitude-5.4 quake centered in the hills east of Los Angeles was the strongest to rattle a populated area of Southern California since the 1994 Northridge disaster.
'Vibration'
In the town of Yermo, about 20 miles from Ludlow, a dozen people in Lee's Tavern didn't seem too concerned when the bottles began to rattle.
"Everyone said, 'Oh, it's an earthquake,'" said Leon Lee, the bar's owner. "We didn't hardly feel anything, just some kind of vibration."
The quake struck 16 miles northwest of Ludlow, which has a population of 10, according to the 2000 U.S. Census.
The quake "is relatively shallow and if it were located in a more populated area it could be very damaging," USGS seismologist Richard Buckmaster said. "But it's out in the middle of the desert, in the middle of nowhere."
Across the Colorado River at the western Arizona border, Fort Mojave Tribal police dispatcher Jessica Hopkins said she felt a gentle rumbling.
Shaking was also felt in Las Vegas, said Scott Allison, a spokesman for the Clark County Fire Department in Nevada. He said there were no reports of injuries or damage.
"People were just calling 911 saying, 'Did I feel the earth move?'" Allison said.
The quake was just a few miles from where a 7.1-magnitude earthquake hit in 1999. USGS seismologist Lucy Jones said it was probably an aftershock of that shake. She said it's not uncommon for big earthquakes to spawn aftershocks years later.
Southern California on average feels about three moderate earthquakes a year, but the region has been unusually quiet since the Northridge quake, Jones said.
Kelly Ghiloni, a spokeswoman with the San Bernardino County Sheriff's Department, said she felt shaking for about 15 seconds but saw no major damage.
"There was some shaking, a little bit of rattling," Ghiloni said. "It was enough to wake you up and know there was an earthquake."
USGS geophysicist Rafael Abreu said the closest fault is the Lavic Lake Fault.