This is I think the best seismic sight for Yellowstone. I have been watching it for years. Not much activity except that swarm last year, but starting in March of this year 2012 it has become very active and unrelenting in its activity. I have NEVER seen it this active or remain active this long. Something is definitely brewing hotter under Yellowstone. [link to www.quake.utah.edu] Especially at YTL and YNR seismic stations.