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Potassium-argon dating indicates that the volcano last erupted about 120,000 years ago in the late Pleistocene. [1] [9] Kohala is currently in transition between the postshield and erosional Hawaiian volcanic stages in the life cycle of Hawaiian volcanoes. [5] The United States Geological Survey has assessed the extinct Kohala as a low-risk area.
This is a list of volcanic eruptions from Kīlauea, an active shield volcano in the Hawaiian Islands that is currently erupting. These eruptions have taken place from pit craters and the main caldera, as well as parasitic cones and fissures along the East and Southwest rift zones.
Lava bed after eruption, photograph by Henry L. Chase, 1868. Kīlauea was the most affected by the lateral displacement associated with the earthquake, as it did not have another major eruption until 1919. [3] It also disrupted the magma system beneath Mauna Loa, as is shown both in reduced lava volumes and an abrupt change in the lava ...
When did Haleakalā last erupt? Haleakalā is considered a dormant volcano. Its most recent eruption was likely between 1480 and 1600, according to the U.S. Geological Survey, which continues to ...
[4] [5] The Hawaiian Volcano Observatory was established on the rim of the Kīlauea Caldera in 1912. [ 6 ] Outside of Halemaʻumaʻu, eruptions from the Kīlauea Caldera have taken place in 1982, 1975, 1974, 1971, 1921, 1919, 1918, and possibly in 1820 and 1790 .
The volume of lava erupted from Kūpaʻianahā declined steadily through 1991, and in early 1992, the vent died. The eruption then returned to Puʻu ʻŌʻō, where flank vents on the west and southwest sides of the cone constructed a new lava shield. Soon lava tubes were feeding lava from the vents to the ocean, with few surface flows in between.
Māhukona is the oldest volcano to build Hawaiʻi island, older than Kohala and Mauna Kea. [2] The Monterey Bay Aquarium Research Institute investigated the area with a remotely controlled submarine in 2001. [3] It was named for the area known as Māhukona, on the shore to the northeast. [4]
By 1937, the Kohala Sugar Company had consolidated into the mill at Māhukona, and became Mahukona Terminals Ltd. In 1941 the port closed for World War II. On October 29, 1945, the railroad closed. [4] The town, which once consisted of about 40 families, was abandoned in the 1950s. [11] In 1956 the harbor was closed.