Current Activity at the Yellowstone Volcanic System
http://volcanoes.usgs.gov/yvo/activity.html

U.S. Geological Survey


This website provides a monthly summary of current geologic events that relate to the Yellowstone volcanic system. The summary includes information about earthquakes, hydrothermal activity, and other events of interest. Links are provided for more in-depth information.

This resource is referenced here:
Subject: Geoscience:Geology:Igneous and Metamorphic Petrology:Volcanology, Geoscience:Geology:Geophysics
Special Interest: Hazards
Topics: Solid Earth:Geophysics, Petrology:Volcanology
Focus on Yellowstone: Surficial geology and hydrology, Seismicity, Deformation, geophysics, Volcanism, Geothermal processes and features, Yellowstone hazards