The largest volcano on the public

mauna loa lava subway scheme 1984

The largest volcano on basis is Mauna Loa on Hawai’i Big Island. Like all Hawaiian volcanoes, Mauna Loa was created equally the Pacific tectonic plate moved over the Hawaiian hotspot inwards the Earth’s underlying mantle. The Hawaii isle volcanoes are simply the most recent prove of this procedure that, over seventy 1000000 years, has created the 3,700 mi (6,000 km)-long Hawaiian–Emperor seamount chain. The prevailing, though non completely settled, sentiment is that the hotspot has been largely stationary inside the planet’s drape for much, if non all of the Cenozoic Era. However, patch the Hawaiian feather is well-understood as well as extensively studied, the nature of hotspots themselves remains fairly enigmatic.

Position of Mauna Loa on Hawaiʻi island
Mauna Loa is with Earth’s most active volcanoes, having erupted 33 times since its start well-documented historical eruption inwards 1843. Its most recent eruption was inwards 1984. Mauna Loa is certainly to erupt again, as well as nosotros carefully monitor the volcano for signs of unrest. See electrical flow activeness as well as long term activeness for a summary of our monitoring efforts.

Mauna Loa is a typical shield volcano inwards form, taking the shape of a long, wide dome extending downward to the bounding main flooring whose slopes are virtually 12° at their steepest, a final result of its extremely fluid lava. The shield-stage lavas that built the enormous original volume of the mount are tholeiitic basalts, similar those of Mauna Kea, created through the mixing of primary magma as well as subducted oceanic crust.

Mauna Loa is tall plenty to accept experienced glaciation during the concluding H2O ice age, 25,000 to 15,000 years ago. Unlike Mauna Kea, on which extensive prove of glaciation remains fifty-fifty today, Mauna Loa was at the fourth dimension as well as has remained active, having grown an additional 150 to 300 m (492 to 984 ft) inwards elevation since thus as well as roofing whatever glacial deposits beneath novel flows; strata of that historic catamenia doesn’t occur until at to the lowest degree 2,000 m (6,562 ft) downward from the volcano’s summit, equally good depression for glacial growth.
Most Recent Eruption
March 24-April 15, 1984
Number of Historical Eruptions
Summit Caldera
Name: Moku`aweoweo, “Moku” refers to a coastal state department or islet; “`aweoweo” is a type of ruddy Hawaiian fish. Literal translation is fish department (the ruddy of the fish suggests ruddy lava).
  • Dimension: three x five km, elongated northeast-southwest
  • Depth: 183 m deep
  • Age: estimated to accept collapsed 600-750 years ago

Oldest Dated Rocks
Between 100,000 as well as 200,000 years ago

Estimated Age of Earliest Subaerial Eruptions
About 400,000 years ago
Estimated Age of First Eruption of Mauna Loa
Between 1,000,000 as well as 700,000 years earlier present
Hawaiian Volcano Stage
Shield-forming stage
References :  USGSwikipediaVolcano Discovery