November 21, 2007
Earthquake felt in Green River

A magnitude 3.4, intensity II earthquake occurred six miles east of Granger, Wyoming at 19:30 MST on November 21, 2007. The U.S. Geological Survey National Earthquake Information Center in Golden, Colorado reported this earthquake to the Wyoming State Geological Survey. The quake was felt as intensity II in Green River, Wyoming.

The WSGS has generated seismological characterizations of all Wyoming counties (see Earthquake Database), which include analyses of historic seismicity as well as projections of possible future earthquakes. For more information, please contact Seth Wittke by phone at (307) 766-2286, ext. 244, or by email at seth.wittke@wyo.gov.

Press Release
from the Office of the Wyoming State Geologist
Ron Surdam, State Geologist