The Emerald City: Wizard Of Oz
Average Depth in Oklahoma Earthquake Approximately 5KM
Oklahoma Shakes After Being Hit With 7 Earthquakes In Just 28 Hours (Forbes)
AUG 7, 2017 - In just 28 hours central Oklahoma was shaken by seven sequential earthquakes, ranging in magnitude from 2 to 5. The earthquakes began this past Tuesday night when five earthquakes repeatedly struck Oklahoma, followed by two more in the early hours of Thursday.
Pair Of 4.2 Magnitude Quakes Damage Homes, Buildings In Oklahoma
March 6, 2018 - The 4.2 magnitude quake was reported at 5:17 p.m.in Garfield County. It struck at a depth of 3.5 miles, making it an extremely shallow natural disaster. The U.S. Geological Survey says the quake was a 4.2.
Oklahoma Just Experienced Its Largest Earthquake on Record (Live Science)
September 8, 2016 - The earthquake that shook Pawnee, Oklahoma, on Sept. 3 is now the state's largest temblor on record, according to the U.S. Geological Survey, which just upgraded the magnitude to 5.8.
2009–18 Oklahoma earthquake swarms (Wikipedia)
Beginning in 2009, the frequency of earthquakes in the U.S. state of Oklahoma rapidly increased from an average of fewer than two 3.0+ magnitude earthquakes per year since 1978 to hundreds each year in the 2014–17 period. Thousands of earthquakes have occurred in Oklahoma and surrounding areas in southern Kansas and North Texas since 2009. Scientific studies attribute the rise in earthquakes to the disposal of wastewater produced during oil extraction that has been injected more deeply into the ground.