[Update 5/10/07] A small swarm of earthquakes measuring up to 2.7 on the Richter Scale was recorded in the Yellowstone area on Wed. May 2, 2007 [/Update]
The USGS has released an Open File Report (OFR) entitled Preliminary Assessment of Volcanic and Hydrothermal Hazards in Yellowstone National Park and Vicinity. Possible future violent events in the active hydrothermal, magmatic, and tectonic system of Yellowstone National Park pose potential hazards to park visitors and infrastructure. Most of the national park and vicinity are sparsely populated, but significant numbers of people as well as park resources could nevertheless be at risk from these hazards. Read on for the link.