This afternoon at 1:51 pm our office started shaking, pretty strongly. And then we all ran outside. Turns out a 5.9 earthquake hit Northern, VA, with its epicenter just northwest of Richmond, and we definitely felt it here in Washington, DC. After talking to the neighbors outside for a few minutes and of course checking twitter, we got down to work.
Using open data released almost immediately from the U.S. Geological Survey, Dave, Nate, and Matt mapped the earthquake using TileMill, our open source map design studio. This map shows the earthquake’s strength in the area where USGS tracked it.