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:Geophysics, Igneous and Metamorphic Petrology:Volcanology
Special Interest: GeoHazards
Focus on Yellowstone: Surficial geology and hydrology, Yellowstone hazards, Seismicity, Deformation, geophysics, Volcanism, Geothermal processes and features
Topics: Solid Earth:Geophysics, Petrology:Volcanology