USGS video shows thousands of earthquakes in the past week

James Marshall
July 10, 2019

There it was, on the hot asphalt of Highway 178 between Ridgecrest and Trona: a gnarly, surprisingly wide scar, courtesy of one very large quake.

Hundreds of thousands of Californians are scratching their heads after an natural disaster warning app failed to provide any advance notice of the magnitude 7.1 quake that hit the state last week.

A man looks into a fissure that opened in the desert.

No deaths or major injuries have been linked to last week's earthquakes, but the magnitude 7.1 tremor that occurred on July 5 was one of the strongest to hit southern California in two decades.

The United States Geological Survey (USGS) says the quake occurred at a depth of about 8 kilometres, and was the result of strike-slip faulting (plates grinding against each other in a roughly horizontal fashion) at a juncture of the Pacific and North American tectonic plates known as the Eastern California shear zone.

According to USGS, there's a 72 percent chance a 6.7 magnitude quake will strike the San Francisco Bay Area in the next 30 years.

According to the Los Angeles Times, there have been 22 earthquakes measuring a magnitude of 6 or greater in California since record-keeping began in 1932. Damage to the hospital includes leaking sprinklers, according to KTLA5. Aftershocks are on the decline but haven't let up yet, with 55 to 120 magnitude 3.0 or greater anticipated over the coming week.

The earthquakes that struck near Ridgecrest Friday and Saturday took place on two separate fault lines that don't connect to the San Andres fault, The Sacramento Bee reported.

Other reports by Click Lancashire

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