Part 4: Observation of volcanic and seismic activities

With what kinds of machines or methods can we observe and study the volcanic and seismic activities? Let us explain what played an important role during the 1990 - 1995 eruption of Unzen Volcano.


Page 1: Seismograph
Page 2: Conversion of seismic-acoustic oscillation
Page 3: Network system of seismic observation in Kyushu Island
Page 4: Seismic activities in Kyushu Island
Page 5: Designing and manufacturing of penetrator-type seismographs
Page 6: Tilt observation
Page 7: GPS observation
Page 8: Thermal imagery

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