Yellowstone National Park has had 437 earthquakes since Friday, December 26, 2008. After a two-day lull they started up again on Jan 9, 2009. The "swarm" might not be over.
Date      # of Quakes
Jan 14 - 8
Jan 13 - 6
Jan 12 - 2
Jan 11 - 3
Jan 10 - 4
Jan 09 - 30
Jan 06 - 2
Jan 05 - 2
Jan 04 - 5
Jan 03 - 11
Jan 02 - 18
Jan 01 - 12
Dec 31 - 58
Dec 30 - 26
Dec 29 - 37
Dec 28 - 103
Dec 27 - 56
Dec 26 - 54
Congratulations to James Pethokoukis of the US News and World Report for the most accurate and balanced reporting of this event!
Yellowstone Supervolcano Earthquakes: Update
US News and World Report, January 6, 2009, 3:09 PM EST The Yellowstone earthquakes have settled down in terms of intensity, with nothing in the 3.0+ range since January 2. If they heat up, I will be back on this story.