Fukutoku-Oka-no-Ba (Japan)

Status Unknown Eruption 2010 -29m
Submarine (Subduction zone / Crustal thickness unknown)

Fukutoku-Oka-no-Ba

Fukutoku-Oka-no-ba is a submarine volcano located 5 km NE of the pyramidal island of Minami-Ioto. Water discoloration is frequently observed from the volcano, and several ephemeral islands have formed in the 20th century. The first of these formed Shin-Ioto ("New Sulfur Island") in 1904, and the most recent island was formed in 1986. The volcano is part of an elongated edifice with two major topographic highs trending NNW-SSE, and is a trachyandesitic volcano geochemically similar to Ioto.

Fukutoku-Okanoba, seen here in eruption in 1986, is a submarine volcano located 5 km NE of the pyramidal island of Minami-Iwo-jima (right). Water discoloration is frequently observed near the volcano, and several ephemeral islands have formed in the 20th century. The first of these formed Shin-Iwo-jima in 1904, and the most recent island is seen in this January 21, 1986 photo. Wave erosion removed the island by March 8. Fukutoku-Okanoba is part of an elongated edifice with two major topographic highs trending NNW-SSE.

Photo by G. Iwashita, 1986 (Japan Meteorological Agency).

Last updated 2019-08-04 00:28:03

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