In recent weeks, the number of earthquakes felt in Oklahoma has decreased compared with this time last year, which might reflect measures state officials took earlier this year to severely limit the volumes of oil and natural gas wastewater injected into deep disposal wells, according to the Oklahoma Geological Survey. “The incidence of earthquakes is down, and that’s attributed to decreased injections,” OGS Director Jeremy Boak said in an interview. Year-to-date the state has seen 403 earthquakes of magnitude 3.0 or above, which puts it on pace to see fewer earthquakes of that magnitude than last year, when Oklahoma saw 907 temblors of 3.0 or higher. However, the current year is still likely to see more quakes than in 2014 when the state saw 569 such earthquakes. “We believe most of the earthquakes that have been happening since 2010-11 have been induced, although there are a few specific examples […]