Damaging earthquakes at Yellowstone National Park are likely to continue occurring every few decades and eventually Yellowstone will erupt again. Looking at history, those same powerful forces that created Yellowstone are still at work today but at a smaller scale and they have the potential to build up and cause a globally devastating eruption sometime in the future.
Source: www.bonsaiinformation.com/ Yellowstone%204.jpg
Hydrothermal activity, earthquakes and ground motion are all current manifestations of the volcanic activity at Yellowstone.
Map of Yellowstone
Source: www.yellowstone.net/ mapyelfodors.jpg