Report on Kuchinoerabujima (Japan) — April 1996
Bulletin of the Global Volcanism Network, vol. 21, no. 4 (April 1996)
Managing Editor: Richard Wunderman.
Kuchinoerabujima (Japan) Number of volcanic earthquakes continues to increase
Please cite this report as:
Global Volcanism Program, 1996. Report on Kuchinoerabujima (Japan). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 21:4. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.BGVN199604-282050.
30.443°N, 130.218°E; summit elev. 639 m
All times are local (unless otherwise noted)
According to reports from Sakura-jima Volcanological Observatory, Kyoto University, 91 earthquakes occurred around Shin-dake in April. Earthquakes have progressively increased here since January 1996. Specifically, there were 32 earthquakes in January, 40 in February, and 77 in March.
Geologic Background. A group of young stratovolcanoes forms the eastern end of the irregularly shaped island of Kuchinoerabujima in the northern Ryukyu Islands, 15 km west of Yakushima. The Furudake, Shindake, and Noikeyama cones were erupted from south to north, respectively, forming a composite cone with multiple craters. The youngest cone, centrally-located Shintake, formed after the NW side of Furutake was breached by an explosion. All historical eruptions have occurred from Shintake, although a lava flow from the S flank of Furutake that reached the coast has a very fresh morphology. Frequent explosive eruptions have taken place from Shintake since 1840; the largest of these was in December 1933. Several villages on the 4 x 12 km island are located within a few kilometers of the active crater and have suffered damage from eruptions.
Information Contacts: Japan Meteorological Agency (JMA), Volcanological Division, Seismological and Volcanological Department, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan.