An explosion caused by the intense heating of subterranean rock which expels lava, steam, ashes, etc., through vents in the earth's crust.

the eruption of molten material, rocks, steam, and other gases from the interior of the earth. Eruption may be continuous and slow (as in Hawaii) or extremely violent (e.g., Mt. St. Helens in Washington). Nuee ardente, a hot, poisonous cloud of gas and debris that races down the side of a volcano, is extremely dangerous and lethal.

The discharge (aerial explosive) of fragmentary ejects, lava and gases from a volcanic vent.152

the sudden occurrence of a violent discharge of steam and volcanic material

Discharge (aerially explosive) of fragmentary ejecta, lava and gases from a volcanic vent.

ejection of hot steam, molten rock, and/or rock fragments through openings in the earth's surface. | | | | | | | | | | N | O | | | | | | | X | Y | Z