California 64Magnitude earthquake generates over 100 aftershocks
LOS ANGELES — Communities in the Mojave Desert tallied damage and made emergency repairs to cracked roads and broken pipes Friday as aftershocks from Southern California’s largest earthquake in 20 years kept rumbling. The small town of Ridgecrest, close to the epicenter, assessed damage after several fires and multiple injuries that were blamed on the magnitude 6.4 quake. A shelter drew 28 people overnight, but not all of them slept inside amid the shaking. “Some people slept outside in tents because they were so nervous,” said Marium Mohiuddin of the American Red Cross. Damage appeared limited to desert areas, although the quake was felt widely, including in the Los Angeles region 150 miles (240 kilometers) away. The largest aftershock thus far — magnitude 5.4 — was also felt in LA before dawn Friday. Ridgecrest Regional Hospital remained closed as state inspectors assessed it, spokeswoman Jayde Glenn said. The hospital’s own review found no structural damage, but there were cracks in walls, broken water pipes and water damage. The hospital was prepared to help women in labor and to give triage care to emergency patients, Fifteen patients were evacuated to other hospitals after the quake, Glenn said. The quake did not appear to have caused major damage to roads and bridges in the area, but it did open three cracks across a short stretch of State Route 178 near the tiny town of Trona, said California Department of Transportation District Nine spokeswoman Christine Knadler. Those cracks were temporarily sealed, but engineers were investigating whether the two-lane highway was damaged beneath the cracks, Knadler said. Bridges in the area were also being checked. The Ridgecrest library was closed as volunteers and staff picked up hundreds of books that fell off shelves. The building’s cinderblock walls also had some cracks, said Charissa Wagner, library branch supervisor. Wagner was at her home in the small city of 29,000 people when a small foreshock hit, followed by the large one, putting her and her 11-year-old daughter on edge. “The little one was like, ‘Oh what just happened.’ The big one came later and that was scarier,” she said. The nearby Naval Air Weapons Station China Lake said in a statement late Thursday that no injuries were reported and so far all buildings had been found to be intact, but assessments continued across its vast acreage. Its workforce was ordered to not report on Friday. The earthquake knocked over a boulder that sat atop one of the rock spires at the Trona Pinnacles outside of Ridgecrest, a collection of towering rock formations that has been featured in commercials and films, said Martha Maciel, a Bureau of Land Management spokeswoman in California. Meanwhile, the nation’s second-largest city revealed plans to lower slightly the threshold for public alerts from its earthquake early warning app. But officials said the change was in the works before the quake, which gave scientists at the California Institute of Technology’s seismology lab 48 seconds of warning but did not trigger a public notification. “Our goal is to alert people who might experience potentially damaging shaking, not just feel the shaking,” said Robert de Groot, a spokesman for the U.S. Geological Survey’s ShakeAlert system, which is being developed for California, Oregon and Washington. The West Coast ShakeAlert system has provided non-public earthquake notifications on a daily basis to many test users, including emergency agencies, industries, transportation systems and schools. Late last year, the city of Los Angeles released a mobile app intended to provide ShakeAlert warnings for users within Los Angeles County. The trigger threshold for LA’s app required a magnitude 5 or greater and an estimate of level 4 on the separate Modified Mercali Intensity scale, the level at which there is potentially damaging shaking. Although Thursday’s quake was well above magnitude 5, the expected shaking for the Los Angeles area was level 3, de Groot said. A revision of the magnitude threshold down to 4.5 was already underway, but the shaking intensity level would remain at 4. The rationale is to avoid numerous ShakeAlerts for small earthquakes that do not affect people.
Construction of a network of seismic-monitoring stations for the West Coast is just over half complete, with most coverage in Southern California, San Francisco Bay Area and the Seattle-Tacoma area. Eventually, the system will send out alerts over the same system used for Amber Alerts to defined areas that are expected to be affected by a quake, de Groot said. California is partnering with the federal government to build the statewide earthquake warning system, with the goal of turning it on by June 2021. The state has already spent at least $25 million building it, including installing hundreds of seismic stations throughout the state. This year, Democratic Gov. Gavin Newsom said the state needed $16.3…
source: www.inquirer.net
Los Angeles (CNN)The strongest earthquake to hit Southern California in nearly 20 years prompted one city to declare a state of emergency Thursday, and shook residents from Las Vegas to Orange County.
The quake, with a magnitude of 6.4, was centered near Ridgecrest, a community west of the Mojave Desert and about 150 miles north of Los Angeles.
At least 159 aftershocks of magnitude 2.5 or greater were recorded after the earthquake, according to USGS Seismologist Robert Graves. It is a higher than normal number, but not unprecedented, he said. The largest of them were magnitude 4.6.
California earthquake generates over 100 aftershocks
Los Angeles (CNN)The strongest earthquake to hit Southern California in nearly 20 years prompted one city to declare a state of emergency Thursday, and shook residents from Las Vegas to Orange County.
The quake, with a magnitude of 6.4, was centered near Ridgecrest, a community west of the Mojave Desert and about 150 miles north of Los Angeles.
At least 159 aftershocks of magnitude 2.5 or greater were recorded after the earthquake, according to USGS Seismologist Robert Graves. It is a higher than normal number, but not unprecedented, he said. The largest of them were magnitude 4.6.
Dozens of aftershocks have been reported following Friday evening’s 7.1-magnitude earthquake that hit near Ridgecrest, just one day after a 6.4 magnitude quake rocked the area.
A 5.4 magnitude earthquake hit Searles Valley early Friday morning, one of a swarm of hundreds of aftershocks in the wake of Thursday’s massive 6.4 magnitude earthquake in the same area.
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At least three Ridgecrest homes appeared to have been completely destroyed in the quake.
More than 150 aftershocks have hit the Los Angeles region after a magnitude 6.4 earthquake struck on the Fourth of July.
A magnitude 5.4 earthquake again rattled the Ridgecrest area and was felt throughout Southern California early Friday morning, less than 24 hours after a magnitude 6.4 quake that struck just a few miles away. Erin Myers reports from Ridgecrest for the KTLA 5 News at 1 on July 5, 2019.
Buildings shook in Los Angeles after an earthquake hit a rural area between the city and Las Vegas.
A 6.4 magnitude quake struck 12 kilometers (7.5 miles) southwest of Searles Valley, California, at 10:33 a.m. local time, according to the U.S. Geological Survey, or about 170 miles from LA.
Los Angeles International Airport said there were no immediate reports of damage.
San Bernardino County’s Fire District said in a tweet that it’s conducting an assessment of the region.
“No injuries reported, however buildings and roads have sustained varying degrees of damage,” the agency said.
Aftershocks from Southern California’s largest earthquake in 20 years rumbled beneath the Mojave Desert on Friday as authorities tallied damage in the sparsely populated region.
The strongest aftershock thus far hit shortly after 4 a.m., registering magnitude 5.4 and awakening people all the way to the coast.
Thursday’s 6.4 magnitude quake struck at midmorning about 150 miles (240 kilometers) northeast of Los Angeles, near the town of Ridgecrest and a sprawling Navy installation.
Multiple injuries and two house fires were reported in the town of 28,000. Emergency crews dealt with small vegetation fires, gas leaks and reports of cracked roads, said Kern County Fire Chief David Witt.
Southern California is awaiting more aftershocks after two powerful earthquakes rocked the area this week. The 7.1 magnitude quake, which hit just after 8 p.m. local time, was felt from Los Angeles all the way to Nevada and caused injuries, sparked fires and closed roadways. The quake was centered in the Mojave Desert near the town of Ridgecrest, which is still recovering from a 6.4 magnitude quake on the Fourth of July. Carter Evans reports.
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The aftershocks keep coming one day after a 6.4 magnitude earthquake hit Southern California. More than 1,000 aftershocks have been detected. Carter Evans reports.
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