Volcano Hazards
U.S. Volcanoes and Current Activity Alerts
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There are 161 potentially active volcanoes in the U.S. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption. We accomplish this by delivering effective forecasts, warnings, and information about volcano hazards based on scientific understanding of volcanic processes.
News
What causes earthquake swarms at Yellowstone?
Earthquake swarms are common at Yellowstone, but why do they occur? Are they driven by magma migration? Water? Steady creep along faults? All three are possibilities, and tracking the style of the earthquakes can reveal the causes.
USGS HVO Information Statement — Magnitude-4.5 earthquake northeast of Pāhala, Island of Hawai‘i
The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.5 earthquake located beneath the south part of the Island of Hawai‘i, in the district of Kaʻū, on Thursday, June 17, at 4:32 p.m., HST.
Volcano Watch — New Instrument Measures Lava Lake with Laser
The night sky over Kīlauea summit lit up with the glow of lava Sunday, December 20th, 2020. Deep in the caldera, the gathered lake water was boiled by surging lava. A reddened plume escaped the crater, as lava took its place within Halemaʻumaʻu.