October 17, 2016

September 26, 2016

Fracking causes earthquakes

Observations that unequivocally link seismicity and wastewater injection are scarce. Here we show that wastewater injection in eastern Texas causes uplift, detectable in radar interferometric data up to >8 kilometers from the wells.

We infer that an increase of >1 megapascal in pore pressure in rocks with low compressibility triggers earthquakes, including the 4.8–moment magnitude event that occurred on 17 May 2012, the largest earthquake recorded in eastern Texas

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September 25, 2016

Australia Is Not Quite Where You Think It Is

The continent has shifted by 4.9 feet since the last adjustment was made to GPS coordinates in 1994.

All of the Earth’s continents float on tectonic plates, which glide slowly over a plastic-like layer of the upper mantle. And the plate that Australia sits on has been moving relatively fast, about 2.7 inches a year (northward and with a slight clockwise rotation).

This type of shifting is coming more into focus as GPS systems get more accurate. The most advanced technology can now pinpoint a location to a matter of inches. Although most consumer cellphones don’t have that level of accuracy (yet), the technology is being used in other ways, including by farmers who spray fields with precision agriculture and self-driving vehicles.

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September 23, 2016

September 22, 2016

September 20, 2016

September 19, 2016

September 16, 2016