According to a January 27, 2015 news release, the U.S. Geological Survey has made available online two new publications about hydraulic fracturing, the Scientific Investigation Report and its companion Data Series, The publications highlight historical hydraulic fracturing trends and data from 1947 to 2010. They "provide a basis for making comparisons of current-day hydraulic fracturing to historical applications" and an "improved understanding of where the practice is occurring and how hydraulic fracturing characteristics have changed over time."
