This week, #Yellowstone #CalderaChronicles describes the recent discovery of a new thermal area in @YellowstoneNPS that has formed over the last 20 years!https://t.co/DJUPXREbSb pic.twitter.com/RB5R8VDVts

— USGS Volcanoes🌋 (@USGSVolcanoes) April 1, 2019