From the Japan Times: Seismologists set off dynamite to probe volcano
KAGOSHIMA — Seismologists set off a large amount of explosives early Thursday to create "artificial earthquakes" as part of their investigations into the strata under the Sakurajima volcano in Kagoshima Prefecture.
Analyzing the reflections of man-made seismic waves is an effective way to grasp the situation, the seismologists said.
During the two-hour experiment that started shortly past midnight, experts from nine universities as well as the Meteorological Agency set off numerous sticks of dynamite at 14 locations in succession. Tremors caused by the explosions were measured by 250 seismometers.
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