Asama Volcano Observatory
Nagakurayama, Karuizawa, Kitasaku-gun, Nagano 389-0111, Japan
AVO is situated on the eastern flank of the volcano with an altitude of 1,406 m.
Established in 1933.
Seismic: Thirteen seismic stations telemetered to AVO; twelve of them surrounding the summit crater
and one to about 20 km north of the crater.
Tilt: Tilt recordings at the 30 m deep vault at AVO.
EDM: Distance recordings from the observatory to two points near the summit.
Leveling: Twice a year over the net in the northeastern flank.
Video: Topography and temperature in the summit crater.
Eruption at Asama Volcano in 1973 (taken by E. Koyama)