Reactivated fault lines Millions of Years Old in Oklahoma could cause Major EarthquakeWe have seen a number of sources over the last few months warning of Oklahoma producing a Large Earthquake that could produce significant damage in that state and now a new report is revealing that Fault lines dating back hundreds of millions of years in Oklahoma that have been recently reactivated could lead to a devastating quake in the state where many structures were not built to withstand major seismic activity, a report said. The state, which has seen several hundred seismic events over the past five years, has “a high degree of potential earthquake hazards,” according to the study accepted for publication this month whose authors include researchers from the U.S. Geological Survey (USGS). “The majority of the recent earthquakes in central Oklahoma define reactivated ancient faults at shallow depths in the crust” of less than 3.7 miles (6 km), said the report for the American Geophysical Union. The report did not look at whether the reactivation of the faults was linked to the energy extraction technique known as hydraulic fracturing, or fracking. Daniel McNamara, one of the paper’s authors and a research geophysicist at USGS, said on Tuesday the 300 million-year-old subsurface faults that had not been active are suspected to be associated with the recent seismic activity. FULL REPORT