Echinus Geyser, the world's largest acidic geyser in Yellowstone's Norris Geyser Basin, has resumed erupting after more than five years of dormancy. Park officials are monitoring the renewed activity for changes in hydrothermal behavior and visitor safety. New research suggesting Yellowstone's magma source may be closer to the surface raises the possibility that deeper magmatic changes could more readily affect geyser systems, reinforcing the need for vigilant monitoring and updated hazard assessments.
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