Graph of Earthquakes, Oklahoma, United States, 1990-2014, Magnitude 2.0 and Greater.
Are earthquakes increasing in Oklahoma? The graph charts the frequency of earthquakes in Oklahoma between 1990 and 2014.
Concerns have arisen that the increase in small earthquakes in Oklahoma may be connected to drilling activities such as deep-water well injection. The Oklahoma Geological Survey recently issued a position statement on the subject. To read this paper, click here. To access the most complete Oklahoma earthquake data, visit the Leonard Observatory catalog at the Oklahoma Geological Survey.