Series Of Earthquakes Strikes Oklahoma Near Wastewater Disposal Wells
http://thinkprogress.org/climate/2015/07/28/3685062/large-earthquakes-hit-oklahoma-near-disposal-wells/
Two relatively large earthquakes struck northwest of Oklahoma City midday on Monday within a span of about 20 minutes. The 4.0 magnitude and 4.5 magnitude quakes were accompanied by another 4.1 quake about seven hours later around 8:20 p.m. Two more smaller earthquakes also rattled the region throughout the day. The largest ever earthquake in Oklahoma was a 5.6-magnitude jolt in 2011.
While there were no reports of damage due to Mondays quakes, they could be felt as far across five states Oklahoma, Kansas, Texas, Missouri, and Arkansas according to the Weather Channel.
The high level of seismic activity, especially in these closely linked swarms, follows a recent trend in fossil fuel-rich Oklahoma in which a dramatic spike in quakes has been tied to wastewater injection wells accompanying proliferating oil and gas drilling operations. In April, the New Yorker published an article on the recent surge in Oklahoma quakes that found that nearly two-dozen peer-reviewed papers have concluded disposal wells and quakes are likely connected.
In recent months, Oklahomas government has embraced the research showing such links and has begun to try to address the problem. Earlier in July, state oil and gas officials put more than 200 new wastewater disposal wells under extra review as Areas of Interest for the possibility that they are contributing to the recent earthquake swarms. This was in addition to 300 wells originally placed under the directive in March. According to E&E News, the 4.5 magnitude quake on Monday centered less than three miles away from an oil and gas wastewater disposal well recently added to the list.
(more)