Yellowstone-Earthquake-Swarm-2013A new U.S. Geological Survey report indicates a slightly greater earthquake hazard in the Greater Yellowstone region of Wyoming, Montana and Idaho than previously thought, a geophysicist says. “The new maps show how Yellowstone has had a relative increase in the hazard,” University of Utah geophysicist Bob Smith said. “It’s not a lot — it’s like 5 to 10 percent of peak acceleration.” The USGS map of seismic hazards also shows that the region is as seismically hazardous as anywhere in the United States. “It’s an area of well-above-normal earthquake hazard,” Smith said. “And now with all the population going in — all the new roads and dams — also high risk.” MORE