Mauna Loa, Hawaii

Mauna Loa
Mauna Loa as seen from the air; Hualālai is visible in the background
Highest point
Elevation	13,679 ft (4,169 m)
Prominence	7,079 ft (2,158 m)
Listing	US highest major peaks 66th US most prominent peaks 38th Hawaii highest major peaks 2nd
Coordinates	19°28′46.3″N 155°36′09.6″W / 19.479528°N 155.602667°W / 19.479528; -155.602667Coordinates: 19°28′46.3″N 155°36′09.6″W / 19.479528°N 155.602667°W / 19.479528; -155.602667
Geography
Mauna Loa Hawaii, U.S. Show map of Hawaii (island) Mauna Loa Hawaii, U.S. Show map of Hawaii
Parent range	Hawaiian Islands
Topo map	USGS Mauna Loa
Geology
Age of rock	700,000–1 million
Mountain type	Shield volcano
Volcanic arc/belt	Hawaiian-Emperor seamount chain
Last eruption	March to April 1984
Climbing
First ascent	Ancient times
Easiest route	Ainapo Trail

Wilkes Campsite
U.S. National Register of Historic Places
Sketch by ship's artist Alfred Thomas Agate
Nearest city	Hilo, Hawaii
Coordinates	19°27′59″N 155°34′54″W / 19.46639°N 155.58167°W / 19.46639; -155.58167
Area	4 acres (16,000 m2)
Built	1840
Architect	Charles Wilkes
Architectural style	Stone shelter
NRHP reference #	74000295
Added to NRHP	July 24, 1974

Mauna Loa (/ˌmɔːnə ˈloʊ.ə/ or /ˌmaʊnə ˈloʊ.ə/; Hawaiian: [ˈmɐwnə ˈlowə]; English: Long Mountain) is one of five volcanoes that form the Island of Hawaii in the U.S. state of Hawaiʻi in the Pacific Ocean. The largest subaerial volcano in both mass and volume, Mauna Loa has historically been considered the largest volcano on Earth, dwarfed only by Tamu Massif. It is an active shield volcano with relatively gentle slopes, with a volume estimated at approximately 18,000 cubic miles (75,000 km³), although its peak is about 120 feet (37 m) lower than that of its neighbor, Mauna Kea. Lava eruptions from Mauna Loa are silica-poor and very fluid, and they tend to be non-explosive.