2004 Eruption at Asama Volcano

Volcano Research Center, Earthquake Research Institute, University of Tokyo

(Left) Small eruption of 17:19 on 15 September 2004. Taken 7.5 km south of the summit by M. Yoshimoto. (Right) Glowing of the summit at 20:40 of 30 September, taken from 4.5 km NNE of the summit by M. Yoshimoto

Smoking summit crater (Kamayama) of Asama Volcano (from southeast). Lava that appeared in middle September is ponded on the floor and new vent of the 23 and 29 September eruptions is located at the center of the pond. Taken from a helicopter of the Nagano Police by M. Yoshimoto on 1 October.

• Chronology and short summary (Oct. 6, 2004)
  
• Air inspection on 1 October (M. Yoshimoto)
• Products of 29 September eruption and their ditribution (Geologic Party)
• Outline of 1 and 16-17 September eruptions
  

Distribution map of observatrion sites of ERI
Seismomters __ GPS (diamond: ERI, squre: GSI)

• Special page: the eruption of Asama Volcano of ERI
• Mt. Asama eruption of Geological Survey
• Asama eruption of Asia Air Survey C. Ltd.
• SAR image of Geographycal Survey Institute (GSI) in Japanese
• Geology and petrology of the Asama volcanic eruption (Shinshu Univ.) in Japanese