Just about 15 minutes ago, as the Explorer team was winding down from a series of meetings this week in a 3rd floor conference room, we felt the building shake - an earthquake!

This was a relatively minor one, only a 3.1 according to the USGS, but it was interesting to learn that its epicenter was located only 3.5 miles away from where we sat. We visited the USGS site, clicked the earthquake KML, and discovered that it was located 2.8 miles below what looks like the 3rd hole at the Redlands Country Club.

Here's a map showing the location of ESRI and the earthquake epicenter from the USGS, and the distance derived using Explorer's measure task. The quake information was updated on the USGS site just a few minutes from when we felt it.

The yellow dots are recent, but minor, quakes in the same area, the largest of which were a 2.1 and 2.2 that happened just a couple of days ago. Hmmm...