Hawaii's youngest and most active volcano, Kilauea, has been erupting lava for decades, adding hundreds of acres to the island since 1983. A recent eruption episode inside its sizable pit crater, Halema'uma'u,

Alaska’s Mount Spurr, a volcano about 80 miles away from the state’s largest city, will “likely” erupt in the coming weeks or months for the first time in over 30 years,