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|その他のタイトル: ||27.Some Phenomena associated with the Kawati-Yamaio Earthquake of Feb. 21, 1936.|
|著者: ||宮部, 直巳|
|著者(別言語): ||Miyabe, Naomi|
|掲載誌情報: ||東京帝国大学地震研究所彙報. 第14冊第2号, 1936.6.5, pp.297-306|
A strong earthquake occurred on Feb. 21, 1936, the epicentre of which is located in the neighbourhood of Mt. Hutagami, situated on the boundary of the prefectures of Osaka and Nara. In association with this earthquake, various phenomena were noticed, among which those described in the present report are somewhat remarkable. (i) Earthsounds were heard in many places in the prefectures of Osaka, Nara, Kyoto and Hyogo. It may be noticeable that the directions of the propagation of the earthsound felt at respective places were not always from the epicentre, but, in most cases, it was felt as had been propagated from the nearest mountain. (ii) In several places in the neighbourhood of the epicentre, the level of the underground water was elevated, while, in several other places, it was found to have been depressed, as shown by the changes in level of the water of the shallow wells. It was also noticed that, in some fields, considerable amount of clayey sands was emitted from 1～2m below the surface, as shown in the photographs, which may probably be connected with the change in the depth of the level of the underground water. (iii) Lights were also observed by several peoples as have been accompanying the earthquake. But, in the case of this earthquake, it may be a question that the appearance of the light was really related to the occurrence of the earthquake.