Iriomote Jima Volcano, Japan

An "X" marks the approximate location of Iriomote-jima submarine volcano, the southernmost Ryukyu Islands volcano.

The submarine volcano is located north of the NE tip of 30-km-wide Iriomote-jima island (lower left) and WSW of the northern tip of the island of Ishigaki-shima (right-center).

A major submarine eruption that was volumetrically one of the largest in Japan during historical time took place at this volcano on October 31, 1924.

It produced pumice rafts that were carried by currents along both coasts of Japan as far north as Hokkaido.

The southernmost Ryukyu Islands volcano is a shallow submarine volcano north of Iriomote-jima island.

The submarine volcano is located 25 km NNE of the NE tip of Iriomote-jima and 35 km WSW of the northern tip of the island of Ishigaki-shima in an area with an estimated depth of 200-300 m.

A major submarine eruption took place at this volcano on October 31, 1924.

It produced rhyolitic pumice rafts with an estimated volume of about 1 cu km that were carried by currents along both coasts of Japan as far north as Hokkaido.

The largest pumice blocks exceeded 1 x 2 m in size, and the volume of ejecta places this poorly known eruption among the largest in historical time in Japan.

PHOTO SOURCE: NASA

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