Environment ❯ Natural Phenomena

Geothermal Activity

Hydrothermal Explosions Geysers Hydrothermal Features Hydrothermal Systems Thermal Springs Earthquakes Lava Flows Thermal Pools Volcanic Activity Gas Emissions Hot Springs Thermal Rivers

Echinus Geyser Reawakens in Yellowstone, Then Eases After Mid-February Burst

Officials say the rare acidic geyser's behavior reflects local hydrothermal cycling tracked by temperature sensors, not increasing volcanic unrest.

Yellowstone Webcam Captures New ‘Dirty Eruption’ at Black Diamond Pool

USGS Confirms 13-Foot Blue Pool in Yellowstone’s Norris Geyser Basin