The rocks are covered by light gray, sandy mud.It is" not surprising" that a hydrothermal explosion occurred at the site, as it has happened several times in recent decades, according to the USGS....
25, with further activity occurring through late January and early February, according to the USGS. Beneath Yellowstone National Park lies a complex and extensive volcanic system....
The park is thoroughly monitored by the USGS and the Yellowstone Volcano Observatory....
综合
ABC新闻-美国新闻
2025-07-16 00:00:00.0
