July 2019 7.1 earthquake centred on Ridgecrest in Southern California

I’m a natural events freak. I admit it. Ever since the 7.i I have been reading about it.

The Ridgecrest earthquakes of July 4 and 5 occurred north and northeast of the town of Ridgecrest, California and west of Searles Valley, California (approximately 122 miles north-northeast of Los Angeles). There were three main shocks of magnitudes 6.4, 5.4, and 7.1, and many perceptible aftershocks, mainly within the area of the Naval Air Weapons Station China Lake. The first main shock (now deemed to be a foreshock) occurred on July 4 at 10:33 a.m. PDT, approximately 11.2 miles ENE of Ridgecrest, and 8.1 mi WSW of Trona, on a previously unnoticed NE-SW trending fault where it intersects the NW-SE trending Little Lake Fault Zone.

This quake was preceded by several smaller earthquakes, and was followed by more than 1,400 detected aftershocks. The M 5.4 and M 7.1 quakes struck on July 5 at 4:08 a.m. and 8:19 p.m. PDT approximately 6 miles to the northwest. The latter, now considered the mainshock, was the most powerful earthquake to occur in the state in 20 years. Subsequent aftershocks extended approximately 30 miles along the Little Lake Fault Zone. Relatively minor damage resulted from the initial foreshock, though some building fires were reported in Ridgecrest near the epicenter. The main quake on July 5 cut power to at least 3,000 residents in Ridgecrest. Effects were felt across much of Southern California, parts of Arizona and Nevada, as far north as the San Francisco Bay Area and Sacramento, and as far south as Baja California, Mexico. An estimated 20 million people experienced the foreshock, and approximately 30 million people experienced the main shock. We didn’t feel it here in Fort Bragg in Northern California.

Click on the images to see full size.

Here’s a map showing where this earthquake and other southern California earthquakes were located:

Location of Ridgecrest Earhquake

Location of Ridgecrest Earthquake

What areas were affected:

Potential disaster area of the Ridgecrest earthquake

Potential disaster area of the Ridgecrest earthquake

These two ground level pics show the damage caused by the quake:

Crack in the earth opened up by the Ridgecrest quake

Crack in the earth opened up by the Ridgecrest quake

Road damage caused by the Ridgecrest quake

Road damage caused by the Ridgecrest quake

This aerial pic REALLY shows the severity of the quake. The road has been displaced several feet:

Road displaced by the Ridgecrest quake

Road displaced by the Ridgecrest quake

This before and after pic I got from Google Maps. You need to click on the pic to see the animated effect.

Before and after animation of the Ridgecrest quake

Before and after animation of the Ridgecrest quake

 

 

 

 

 

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