Beneath one of the most stunning national parks in the United States lies a slumbering giant that remains unknown to many visitors. Recent monitoring indicates ongoing ground shifts and a constant occurrence of minor tremors at Yellowstone, while Mount Rainier in Washington has now been classified by the US Geological Survey as the most hazardous volcano in the contiguous 48 states. Glacier-fed mudflows could potentially reach Tacoma in less than an hour, endangering over 90,000 residents. Additionally, Alaska's Mount Spurr is exhibiting signs of increased activity. Here’s what researchers are currently monitoring with great attention.
