The still active Long Valley Caldera, California, the topic of this site, is under study and monitoring by the US Geological Survey (USGS). Featured data of this Website include current conditions, long-term outlook, volcanic activity of the Mono Lake area, and earthquake, deformation, and gas emission and geothermal activity. The graphs, figures, and tables are updated regularly with the newest data. Examples include pressure/ strain graphs, maps of seismic activity, and water level and barometric changes in wells. The image gallery contains nice shots of the caldera rim, volcanic flows, and the stunning scenery of the area. This is a good resource for geoscientists interested in volcanic monitoring.