Raton
http://en.wikipedia.org/wiki/Raton-Clayton_volcanic_field
“A few hotspots are thought to exist below the North American Plate. The most notable hotspots are the Yellowstone (Wyoming), Raton (New Mexico), and Anahim hotspots (British Columbia). These are thought to be caused by a narrow stream of hot mantle convecting up the Earth’s core-mantle boundary called a mantle plume, although some geologists prefer upper-mantle convection as a cause.”
http://en.wikipedia.org/wiki/North_American_Plate
My sincerest thanks for the correction, silverleaf! I knew there were volcanic plumes in the area, but I always thought they were part of a larger caldera associated to Yellowstone.
Good reading!
Good in-depth article
5.5 earthquake hits Trinidad area, Colorado, US
http://thewatchers.adorraeli.com/2011/08/23/5-5-earthquake-hits-trinidad-area-colorado-us/
Colorado doesn’t have a whole lot of earthquake activity. There was really no way to monitor scientifically till about 1960. Here is an interesting link on the seismic activity that has happened here thus far...
And according to this - there have been 156 earthquakes in the past 100 years (8.22.1911 - 8.22.2011)
So 10 of those have been in the past 24 hours