Zippyjuan
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It was pretty shallow- about half a mile below the surface- which is why more people felt it than other similar sized quakes.
https://www.bbc.com/news/world-us-canada-48891511
https://www.bbc.com/news/world-us-canada-48891511
California Quake Damage Not As Bad As Feared
A 7.1 magnitude earthquake has rattled parts of Southern California, the biggest tremor to strike in 20 years.
It struck at the shallow depth of 0.9km (0.6 miles) and its epicentre was near the city of Ridgecrest, about 240km north-east of Los Angeles.
A 6.4-magnitude quake hit the same area on Thursday at a depth of nearly 11km.
Emergency officials say the damage is not as bad as they initially feared, with power restored to most who had lost it and food stores trading again.
All of the roads that were damaged by the quake have also now been reopened, they say, but add that crews are still assessing the aftermath.
It's thought about 3,000 people in Ridgecrest and the surrounding area were left without power.
California Governor Gavin Newsom offered his "heartfelt support" to all those affected, and requested a Presidential Emergency Declaration and federal aid to help.
He later added that there were a number of "minor to moderate level" injuries, and said there were "no reports of any fatalities, so I think we're very lucky there".
Seismologist Dr Lucy Jones said the quakes could continue. "This is an earthquake sequence," she said at a press conference. "It will be ongoing."
"Every earthquake makes another earthquake more likely," she added, saying there was a 10% chance of a similar or even larger quake following in the next week.
However, Dr Jones said it was not likely the quake would trigger shocks on other fault lines.
The earthquake was felt as far away as Las Vegas in the neighbouring state of Nevada and over the border in Mexico.
Fires broke out and emergency services were dispatched across the state to deal with calls after the quake.
"We've got fires, we've got gas leaks, we've got injuries, we've got people without power," Ridgecrest Mayor Peggy Breeden told Reuters news agency. "We're dealing with it as best we can."
California is prone to earthquakes as it lies on a number of faults - regions where tectonic plates come together.
Dr Jones told the Los Angeles Times this fault could be up to 30 miles long.
"The fault is growing," she said. "We ruptured a piece in the first earthquake... and we've ruptured more now."
The San Andreas Fault is the largest, extending about 1,200km through the state.
But Dr Jones said this quake was in a distant fault system, and was unlikely to trigger a quake along the San Andreas Fault.
This latest series of quakes has caused relatively minor damage - that we are currently aware of - but they have rattled nerves, big time.
The latest was felt as far afield as Las Vegas in Nevada, Palm Springs to the east of Los Angeles, and Beverly Hills.
With a baseball game in progress at Dodger Stadium, in downtown LA, people fled from their seats as the building started to shake - although the players, apparently oblivious to what was happening, continued with the game.