Yellowstone National Park - Recent Earthquakes

Yellowstone National Park sits on top of a "supervolcano" that last erupted on a massive scale about 640,000 years ago. Scientists have estimated the chance of another super eruption happening at about 0.00014 percent yearly -- i.e. it's almost certainly not going to happen.
The University of Utah Seismograph Stations reports that a light earthquake occurred at 06:34 AM on March 30, 2014 (MDT). The epicenter of the magnitude 4.8 shock was located 4 miles north-northeast of Norris Geyser Basin in Yellowstone National Park, Wyoming. This earthquake is part of a series of earthquakes that began in this area on Thursday, March 27. As of 8:15 am today, this series has included at least 25 earthquakes in addition to the main shock, with the largest of magnitude 3.1. The magnitude 4.8 main shock was reported felt in Yellowstone National Park and in the towns of West Yellowstone and Gardiner, Montana.

Realtime - GEOFON Global Seismic Monitor

Global seismicity located automatically using the GEOFON network. Only stations in and around Europe are currently used to locate events. Epicenter data and a detailed location map are displayed for the last "big" event. There is also a large version suitable for display on a 1280x1024