The rate of earthquakes in Oklahoma has dropped dramatically since late May, when the state limited wastewater injections into energy wells, an Associated Press statistical analysis shows. And a new scientific study says the state is on its way back to calmer times that prevailed before a huge jump in man-made quakes. For quake-prone parts of Oklahoma, the state ordered what is essentially a 40 per cent reduction in injection of the saltwater that scientists generally blame for the massive increase in earthquakes.
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