At approx.18:10 ...The Hokkaido University seismometer records some volcanic related subterranean shifting 500m below the earth surface which lasted six minutes. At approx.18:40 ...Higashi Onuma. Ikusagawa and Onakayama (Mt. Yokotsu) have reported between l-1.5cm of volcanic ash.
ETIMEHOTKEY * The pictures below show the layer of volcanic ash on snow.
19:00...Nanae Town Office issues a warning to Onuma area as a precautionary measure. 19:30...Nanae establishes a team to operate from its headquarters in Town office. At approx.19:35 ...The seismometer records a very minute quake. 20:00...Regional Development and Constitution Department headquarters established. 21:00...Hokkaido Perfecture Government, Hakodate District Public Works Management Office headquarters established. 21:30...Oshima-Hokkaido headquarters established. 21:40...Five towns send people to form a team in Mori. At approx.22:00 ...Komagatake's emissions change from white smoke to black for only fifteen minutes. At approx.22:40 ...The base of the smoke is black . Smoke blows towards Shikabe because of the wind. At approx.23:05 ...A slight eruption is witnessed, and ash falls in Choshiguchi (south- east 6 km) and Nanae Ski Resort (southeast 12km). Since Hokkaido University commenced use of a seismometer to track Komagatake's seismic activity (in 1966), this is the first time any activity has been recorded.
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