On August 23, 2011 tens of millions of people all over the East Coast and southeastern Canada suddenly felt the earth shaking from the largest earthquake in that area since the M5.8 earthquake in 1944 near Cornwall and Massena, New York. When the earth stopped shaking, more than 148,000 people reported their experience of the earthquake on the Did You Feel It? website representing an area occupied by one-third of the U.S. population. The total economic losses from the earthquake totaled to about $200-$300 million. This M5.8 earthquake that occurred near Mineral, Virginia provided scientists with a rare opportunity to record, observe, and analyze data that had previously not been available for this part of the United States.