Usu (Hokkaido Prefecture, Japan)
Mt. Usu, Japan
| Volcano: | Usu (see Usu at the Smithsonian Institution website in a new tab) |
|---|---|
| Type: | Soil Diffuse Emission |
| Description: | Mt Usu volcano is Hokkaido is one of Japan's most well-known volcanoes. The summit of Usu consists of several lava domes that formed in historic time. The 2000 eruption of Usu volcano was the first in 22 years and followed several days of increased seismicity and ground deformation. A first new vent opened in the West-Nishiyama area on 31 March 2000, followed by activity in the Kompira area on 1 April. Eruptive activity lasted for more than a year and gradually declined until September 2001. The eruptions were phreatic and phreato-magmatic, and caused small pyroclastic flows. |
Point of contact for this site:
Hiroshi Shinohara, shinohara-h@aist.go.jp (Geological Survey of Japan, AIST)
| Measurement | date (d/m/y) | Added by | Added on |
|---|---|---|---|
| Usu_091998 | 1/9/1998 | Emanuela Bagnato | Oct. 5, 2014 |
| Usu_091999 | 1/9/1999 | Emanuela Bagnato | Oct. 5, 2014 |
| Usu_062000 | 1/6/2000 | Emanuela Bagnato | Oct. 5, 2014 |
Bibliographic references for this site
Hernández P.A. , K. Notsu, J.M. Salazar, T. Mori, G. Natale, H. Okada, G. Virgili, Y. Shimoike, M. Sato,N.M. Pérez, 2001,Carbon dioxide degassing by advective flow from Usu volcano, Japan, Science, vol.292, pp. 83-86
