The number of earthquakes in Oklahoma has increased dramatically over the past years. There are now more measurable quakes in OK than California or Alaska. Why? Fracking.
Oklahoma recorded more than three times as many earthquakes as California in 2014 and remains well ahead in 2015. Data from the U.S. Geological Survey shows that Oklahoma had 562 earthquakes of magnitude 3.0 or greater in 2014; California had 180. As of Jan. 31, Oklahoma recorded 76 earthquakes of that magnitude, compared with California's 10.
According to the Advanced National Seismic System global catalog, in 2014, Oklahoma even beat Alaska, the nation's perennial leader in total earthquakes, though many small events in remote areas go unrecorded there.
This afternoon, an earthquake hit Virginia between Charlottesville and Richmond. It measured 5.9 on the Richter scale. For an earthquake, that's in the "moderate" range but for an East Coast earthquake, it's quite unusual. A look at the historical data for the eastern US states shows that this is the biggest quake to hit this coast since 1897 (a 5.9 in VA) and the second biggest of all time (well, since they started recording such things) after a 7.3 that hit South Carolina in 1886.
The video is 17 minutes long; the first 6 minutes is a long drive during which you don't see a whole lot of intact buildings...and many stretches with no buildings at all. See also a 1905 streetcar trip down Market Street. (via devour)
Human activities can trigger natural disasters such as earthquakes and flooding.
"Dams are the most dangerous man-made structure likely to cause quake," says David Booth of the British Geological Survey. By artificially holding a large volume of water in one place, dams increase pressure on fractures beneath the surface of the earth. What's more, water has a lubricating effect, making it easier for the fractures -- or faults -- to slip.
Absolutely incredible photos of a wedding and then an earthquake.
Can you imagine what it was like to have been photographing a wedding in Sichuan, China when 7.9 earthquake hit and shakes for three minutes? From what I understand, there were thirty-three missing guests in this church.
Satellites measuring the earth's gravity from orbit detected a change in gravity from the massive earthquake that caused the tsunami in the Indian Ocean. "The gravity at the earth's surface decreased by as much as about 0.0000015 percent, meaning that a 150-pound person would experience a weight loss of about one-25,000th of an ounce."
Is Taipei 101, the world's tallest building, causing earthquakes? "The considerable stress might be transferred into the upper crust due to the extremely soft sedimentary rocks beneath the Taipei basin. Deeper down this may have reopened an old earthquake fault". (thx, malatron)