The USGS ranks the nation’s most hazardous peaks by threat potential, tracking seismic swings, gas emissions and ground swelling in real time. Some sit quiet for centuries between outbursts while one ...

Kilauea, the restless shield volcano on Hawaii’s Big Island, has been erupting in dramatic, repeating bursts since late 2024, with lava fountains and volcanic gas-and-ash plumes rising high above the ...