Steve, by the way found this for you tonight!
enjoy!
http://volcanoes.usgs.gov/yvo/activity/monitoring/deformation.php
http://www.uusatrg.utah.edu/ts_ysrp.html
Easy to understand now the tectonics behind such a swarm.
Running from a line from Old Faithful, the elevation has risen dramatically, while just a few miles away, from a line north from Madison the area has subsided.
Good stuff right here!