Wednesday, 21 August 2013 3:35 p.m.
From the website Science Daily (here). How Shale Fracking Led to an Ohio Town's First 100 Earthquakes Aug. 19, 2013 — Since records began in 1776, the people of Youngstown, Ohio had never experienced an earthquake. However, from January 2011, 109 tremors were recorded and new research in Geophysical Research-Solid Earth reveals how this may be the result of shale fracking. In December 2010,