Earthquakes in Oklahoma

john's picture

The Oklahoma Geological Survey and the US Geological Survey recently released a statement on the ongoing earthquake activity in that state.  They noted that the rate of earthquake activity has increased remarkably in the state, with 145 earthquakes having magnitude M>3 since January, 2014.  That currently makes Oklahoma the most seismically active state in the US.  Below we reproduce an image from that report.

We can use the hazard viewer to determine how these events translate into increasing probability of large earthquakes having M>5.  We select a region encompassing the most active area: