A rare underwater eruption at Hunga Tonga sent water vapor into Earth’s atmosphere, cooling the stratosphere and reshaping ...

TOKYO — The Tokyo Metropolitan Government has laid out detailed procedures to follow in the event of a volcanic eruption near the capital, including specific steps to deal with ash from Mount Fuji.

Volcanoes rarely erupt without warning, but the signals they send are often subtle, scattered and easy to miss. Now a new line of research suggests the forests that cloak many volcanoes quietly record ...