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The southwest United States has thousands of volcanoes that were only active for a very short period of time and, a new analysis published in the journal Geosphere urges emergency managers to be aware of the potential for further volcanic activity. The authors of the study counted 2,229 volcanoes in 37 volcanic fields located in the southwest United States and northern Mexico. While it is dotted with volcanic fields, the region has not received the same amount of attention for its volcanism as some other areas of the country such as the Pacific Northwest, which is home to volcanoes like Mount Saint Helens and Mount Rainier.
