<P> Other media reports were more hyperbolic in their coverage . </P> <P> A study published in GSA Today, the monthly news and science magazine of the Geological Society of America, identified three fault zones on which future eruptions are most likely to be centered . Two of those areas are associated with lava flows aged 174,000--70,000 years, and the third is a focus of present - day seismicity . </P> <P> Studies and analysis may indicate that the greater hazard comes from hydrothermal activity which occurs independently of volcanic activity . Over 20 large craters have been produced in the past 14,000 years, resulting in such features as Mary Bay, Turbid Lake, and Indian Pond which was created in an eruption about 1300 BC . </P> <P> In a 2003 report, USGS researchers proposed that an earthquake may have displaced more than 77 million cubic feet (2,200,000 m) (576,000,000 US gallons) of water in Yellowstone Lake, creating colossal waves that unsealed a capped geothermal system and led to the hydrothermal explosion that formed Mary Bay . </P>

What is the largest volcano in the us