Mail to the author Meteorological Research Institute carried out various geophysical researchs on the volcanic eruption of Unzen volcano in 1990-95.
The followings are some introduction on our research.
You will get more detailed information on Unzen volcano and its eruptive history in
http://hakone.eri.u-tokyo.ac.jp/unzen/index.html .
1. Distribution of observation points around Unzen volcano
2. Research on seismic and infrasonic waves from pyroclastic flows
3. Research on infrasonic pulse from low frequency earthquake