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What are the two major Hawaiian volcanoes?

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The fluidity of molten basalt favors the formation of lava flows, which is why the Hawaiian volcanoes generally have gentle sloping sides. By contrast, lavas with higher silica ... as the Emperor seamounts. The two primary volcanoes that make up Oahu (where Honolulu is) have not erupted for well over a million years! read more

Active Volcanoes of Hawaii The Hawaiian Islands are at the southeast end of a chain of volcanoes that began to form more than 70 million years ago. Each island is made of one or more volcanoes, which first erupted on the floor of the Pacific Ocean and emerged above sea level only after countless eruptions. read more

There’s five on the Big Island alone. If you mean active volcanoes, then it’s three: Mauna Loa (the biggest single mountain mass, and largest volcano on earth), Mauna Kea (the 2nd biggest mountain mass on earth), Hualālai, and Kilauea. read more

Hualalai is monitored by geologists of the U.S. Geological Survey’s Hawaiian Volcano Observatory. In the last 24 years there have been no swarms of microearthquakes nor any harmonic tremor. Since the early 1980’s the geologists have been surveying the volcano. read more

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Island of Hawaii Forum
www.to-hawaii.com

USGS: Volcano Hazards Program
volcanoes.usgs.gov