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More than 6 million in Los Angeles area remain under critical fire threat as high winds last through Wednesday; Anti-hunger groups tackle increased need during the L.A. fires; How Alabama employees can drive climate action in 2025; SCOTUS rejects Utah's attempt to control public lands.

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The Special Counsel's report says Donald Trump would have been convicted for election interference. Defense Secretary pick Pete Hegseth faces harsh questioning from Senate Democrats, and law enforcement will be increased for next week's inauguration.

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Opponents of a proposed Alaskan mine warn proponents they can't eat gold when the fish are gone, ahead of what could be mass deportations, immigrants get training about their rights, and a national coalition grants money to keep local news afloat.

USGS: Man-made Earthquakes Up 4,000 Percent in NM

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Monday, April 27, 2015   

SANTA FE, N.M. - Man-made earthquakes in New Mexico, linked to oil and gas exploration, have increased by about 4,000 percent in recent years, according to a new report from the U.S. Geological Survey.

Robert Williams, a geophysicist with the USGS, explains how the millions of gallons of water extracted with oil and gas, and then returned underground through disposal wells, appear to be causing the instability that leads to more earthquakes.

"When you inject that water back into a different location in the earth, you're changing the stress conditions of the rocks," says Williams. "It can lead to changes and stresses on the fault, and weaken those forces holding the fault together, which can then cause an earthquake."

In the first 13 years of this century, Williams says there were 16 earthquakes measured at magnitude 3.8 in New Mexico compared to only one quake of that size in the preceding 32 years. He says the major spike in quake activity began in 2009, and mirrors major growth in oil and gas development. Williams says the USGS will use its research to help in future forecasting of earthquakes.

The report also notes major man-made earthquake increases in Alabama, Arkansas, Colorado, Kansas, Ohio, Oklahoma, and Texas. Williams says last year, Oklahoma, the most active of the states for the first time ever, had more quakes of 'magnitude three' and higher, than California.

"For Oklahoma in 2014, there were 585 earthquakes magnitude three and greater," he says. "California had about 200 of that size."

Prior to 2009, Williams says Oklahoma experienced one or two quakes of a 'magnitude three' or higher each year whereas now, there are one or two quakes that size, each day.


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