訂正日: 2006/03/27訂正理由: -訂正箇所: 論文抄録訂正内容: Wrong : In No. 13, Vol. II of the Proceedings, we have described and discussed great geyser of Atami. and proposed a theory for the explanation of the interesting phenomenon. Since then, the automatic records of daily eruptions have been taken continuously up to data. Anomalous eruption called nagasaki (long boiling ) was met with twice during this period. Besides, an extraordinary decrease of the activity which occurred in May of this year was investigated in some details. In the followings, the results of these observations are given and an explanation based on our previous theory are proposed.
