To monitor volcanic and seismic activity in the Yellowstone area the Yellowstone Volcano Observatory (YVO) was established in 2001. YVO is partnership of scientists from the US Geological Survey, National Park Service, University of Utah, University of Wyoming, University NAVSTAR Consortium (UNAVCO) and the state Geological Surveys of Wyoming, Montana and Idaho. YVO scientists monitor Yellowstone volcano with a real time and near real-time monitoring network of 26 seismic stations, 16 GPS receivers, and 11 stream gauging stations. Scientists also collect information is on temperature, chemistry, and gas concentrations at selected hydrothermal features and chloride concentrations in major rivers. A monthly activity summary, real-time monitoring of seismicity and water flow, and near real-time monitoring of ground deformation, can be found at the Yellowstone Volcanic Observatory website.