Nation Sep 03 Oklahoma rocked by one of its biggest earthquakes in history What is believed to be one of the biggest earthquakes in the state’s history struck northern Oklahoma on Saturday morning. By Kamala Kelkar
Nation Aug 28 Why is Oklahoma seeing fewer earthquakes? Scientists point to new oil & gas rules Oklahoma state regulators have taken a hard look at the practice of disposing of wastewater underground, and how it affects earthquakes. By Michael D. Regan