Volcanoes are a natural way for the Earth and other planets to cool themselves. The interiors of planets are extremely hot, and when a volcanic eruption occurs, the internal heat escapes to the surface. This eruption happens when magma and gases are expelled. Some volcanoes are only active for a short period, while others can last for hundreds of thousands or even millions of years.
Mauna Uli Fountains, February 1972
Mauna Loa
Mauna Loa
Mauna Loa Lava Flow
Northeast Rift, 9400′ Mauna Loa, 1984
Pahoehoe Flow, 1986 Kalapana Gardens
Pauahi Lava Lake with 20′ Rampart, 1973
Puu Oo in Repose, 1986
Puu Oo Lava Stream and Puu Halulu
Roof Forming on Lava Stream, December 1970
Shield C-48 with Summit Lava Pond
Skylight in Active Lava Tube, 1986
Small Fountain at Mauna Uli, February 1972
Summit and SW Rift, 1971
Vigorous Fountain and Lava Channel, 1986
Visitors Enjoy Summit Eruption, August 2, 1971
Stozek Crater at the Summit of Mauna Kea against the backdrop of Mauna Loa
