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Volcano Photos

Miyake Jima Volcano, Japan

 Miyake Jima Volcano, Japan, Volcano photo


Miyake Jima Volcano, Japan

The craters in the foreground and the lava flow at the right were erupted in 1983 from vents on the SW flank of Miyake-jima volcano.

The circular, 8-km-wide island of Miyake-jima forms a low-angle stratovolcano that rises about 1100 m from the sea floor in the northern Izu Islands about 200 km SSW of Tokyo.

The 815-m-high summit cone of O-yama (upper right) lies within a caldera that formed about 3000 years ago.

Frequent historical eruptions have occurred at Miyake-jima since 1085 AD at vents ranging from the summit to below sea level.

The circular, 8-km-wide island of Miyake-jima forms a low-angle stratovolcano that rises about 1100 m from the sea floor in the northern Izu Islands about 200 km SSW of Tokyo.

The basaltic volcano is truncated by small summit calderas, one of which, 3.5 km wide, was formed during a major eruption about 2500 years ago.

Parasitic craters and vents, including maars near the coast and radially oriented fissure vents, dot the flanks of the volcano.

Frequent historical eruptions have occurred since 1085 AD at vents ranging from the summit to below sea level, causing much damage on this small populated island.

After a three-century-long hiatus ending in 1469, activity has been dominated by flank fissure eruptions sometimes accompanied by minor summit eruptions.

A 1.6-km-wide summit caldera was slowly formed by subsidence during an eruption in 2000; by October of that year the crater floor had dropped to only 230 m above sea level.

PHOTO SOURCE: Ichio Moriya (Kanazawa University), courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.


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