Report on Kirishimayama (Japan) — December 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 12 (December 1991)
Managing Editor: Lindsay McClelland.
Kirishimayama (Japan) Continued steaming and weak tremor
Please cite this report as:
Global Volcanism Program, 1991. Report on Kirishimayama (Japan) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 16:12. Smithsonian Institution.
31.934°N, 130.862°E; summit elev. 1700 m
All times are local (unless otherwise noted)
Seismicity remained at low levels through mid-January, but weak tremor continued to be recorded by a seismometer 1.7 km SW of the summit crater. Steam began to emerge from the crater on 24 November, and steady steam emission to 100-200 m height was continuing in mid-January.
Geologic Background. Kirishimayama is a large group of more than 20 Quaternary volcanoes located north of Kagoshima Bay. The late-Pleistocene to Holocene dominantly andesitic group consists of stratovolcanoes, pyroclastic cones, maars, and underlying shield volcanoes located over an area of 20 x 30 km. The larger stratovolcanoes are scattered throughout the field, with the centrally located Karakunidake being the highest. Onamiike and Miike, the two largest maars, are located SW of Karakunidake and at its far eastern end, respectively. Holocene eruptions have been concentrated along an E-W line of vents from Miike to Ohachi, and at Shinmoedake to the NE. Frequent small-to-moderate explosive eruptions have been recorded since the 8th century.
Information Contacts: JMA.