巻号一覧
6 巻 (1953)
- 4 号 p. 163-
- 3 号 p. 117-
- 2 号 p. 69-
- 1 号 p. 1-
前身誌
6 巻, 1 号
選択された号の論文の4件中1～4を表示しています
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慶松 光雄1953 年 6 巻 1 号 p. 1-6
発行日: 1953/08/30
公開日: 2010/03/11
ジャーナル フリーThis earthquake was the greatest among the historical earthquakes in the vicinity of Hainan Island. But according to the authentic histories the damage caused by the earthquake on the day was restricted to Luch'uan, Kuanghsi Province, although at another part of one of these histories we find a description of a regional destructive earthquake in the districts around Hainan Island and Leichou Peninsula. These two data have hitherto been ascribed to two different earthquakes, but the writer's closer examination of the gazetteers of each Sheng _??_, Fu _??_, Chou _??_ and Hsien _??_ in the Kuangtong and Kuanghsi Provinces revealed that they are nothing but the descriptions of one and the same earthquake on the very day. The documents at more than 20 places give the same date and seven of them testify the same time of occurrence of the shock at 21-23h, and 8 others denote that it was at night.
The annexed map shows the whole seismic area in which the capital cities of each Hsien, where documents testify that the shock took place on July 13, are denoted by circles. Places suffered some damage were indicated by horizontal diameters in the circle (Θ) The districts in the north-east part of Hainan Island suffered most from the earthquake, where almost all the buildings were destroyed and fissuring and subsidence of the ground, land-slides and spouts of water were seen everywhere. The damage along the north-east coast was especially heavy, the city-walls of the two Hsiens, Ch'iungshan and Linkao, were completely destroyed, showing vividly the severity of this earthquake, and thousands of people being killed in the former city. The damage on the Leichou Peninsula must have, been great though we have no data since the intensity at Luch'uan at further north was so severe as above mentioned. From the distribution of intensity, the epicenter and magnitude of the earthquake were determined. The circles denoting isoseismals in Japanese intensity scale are those corresponding to the magnitude Mk=5.6 or M=7.7.
Although the epicentre is located in the Ch'iungchou strait, no description concerning the tsunami on this occasion has been found. Documents relating that the aftershoks lasted from a few months to a year were found, but we could not find any description of foreshocks of this earthquake.抄録全体を表示PDF形式でダウンロード (765K) -
爆破地震動研究グループ1953 年 6 巻 1 号 p. 7-12
発行日: 1953/08/30
公開日: 2010/03/11
ジャーナル フリーOn Dec. 27th, 1951, 7.8 tons of carlit were exploded at Isibuti, adjacent to the site of our first experiment, the result of which we have already reported. Seismic waves from the explosion were observed along two profiles, extending to the south and to the east from Isibuti.
In the eastern direction, at least three horizontal layers are found, the velocities of P waves through them being 2.56, 4.67 and 6.08km/sec and the depths of the interfaces between them being 0.75km and 1.59km respectively.
Different features are seen in the southern direction, that is, no effect of the second layer can be recognized, and the velocity in the third layer is about 5.91km/sec. At Sinobu, where the epicentral distance is 160km, a phase is seen, which may correspond to a phase through the lower (fourth) layer, i. e. so-called Pn. Also a phase with the velocity of 3.37km/sec is seen in both of the directions, which may be supposed to be S in the previous experiment. But a remarkable phase of the same velocity, which appeared about 1 second after S in the first experiment, cannot be found this time.抄録全体を表示PDF形式でダウンロード (601K) -
佐藤 泰夫1953 年 6 巻 1 号 p. 13-35
発行日: 1953/08/30
公開日: 2010/03/11
ジャーナル フリーPDF形式でダウンロード (2433K) -
秋間 哲夫1953 年 6 巻 1 号 p. 36-60
発行日: 1953/08/30
公開日: 2010/03/11
ジャーナル フリーPDF形式でダウンロード (2958K)
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