Sierra County Earthquake Swarm – Over 700

Russ Steele

This is not political, but I was checking Ice Age Now and came across this item in our back yard and decided to share it with readers:

There have been more than 30 quakes of a magnitude 1 or more in the last week, the largest being about 1.8, said Ken Smith, seismic network manager for the Nevada Seismological Lab.

But the quakes are so deep — most are 18 miles below the surface or more — and so minor Smith thinks they have little chance of being felt at the surface. They are centered about 2 miles west of Sierraville and 31 miles west of Reno. 

 Seismologists can’t say with certainty yet what is happening, but appears the quakes are being caused by moving magma. The earth is basically divided into layers of the crust, the mantle and the core with the temperature getting hotter the deeper the depth. Smith said the ground in this area is constantly in motion, moving about 14 millimeters a year. Because of that motion, it appears magma found a way to flow from the mantle, the middle area, to the crust, the upper area.

“The upper mantle in this region has a lot of magma in it,” Smith said. “Sometimes it finds a way to work its way into the lower crust or the crustal-mantle plate. … As everything is moving around, they have an opportunity to inject magma into places where it can.”

More details at RGJ.COM

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About Russ Steele
Freelance writer and climate change blogger. Russ spent twenty years in the Air Force as a navigator specializing in electronics warfare and digital systems. After his service he was employed for sixteen years as concept developer for TRW, an aerospace and automotive company, and then was CEO of a non-profit Internet provider for 18 months. Russ's articles have appeared in Comstock's Business, Capitol Journal, Trailer Life, Monitoring Times, and Idaho Magazine.

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