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+--- Thread: USGS study: OK and other quakes mandmade (/showthread.php?tid=224)
USGS study: OK and other quakes mandmade - Skywise - 04-23-2015
With maps and graphs.
Brian
Man-made earthquakes increasing in central and eastern U.S., study finds
http://www.latimes.com/visuals/graphics/la-me-quake-frack-20150423-htmlstory.html