著者

松本 利松

出版者

東京大学地震研究所

雑誌

東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo (ISSN:00408972)

巻号頁・発行日

vol.37, no.3, pp.531-544, 1959-10-20

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An earthquake having a magnitude of 6.2 occurred in the neighbourhood of Tesikaga-town, Hokkaido, at 5h 39m (G.M.T.) on January 31, 1959. The location of the hypocenter of this shock is determined as 43°26'N, 144°23'E, and 20km depth by Japan Meteorological Agency. The aftershocks were observed at Tesikaga and Okusyunbetu wich the electromagnetic seismographs during the period of Feb. 14 to Mar. 1.

著者

松本 利松

出版者

東京大学地震研究所

雑誌

東京大學地震研究所彙報 (ISSN:00408972)

巻号頁・発行日

vol.37, no.3, pp.531-544, 1959-10-20

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An earthquake having a magnitude of 6.2 occurred in the neighbourhood of Tesikaga-town, Hokkaido, at 5h 39m (G.M.T.) on January 31, 1959. The location of the hypocenter of this shock is determined as 43°26'N, 144°23'E, and 20km depth by Japan Meteorological Agency. The aftershocks were observed at Tesikaga and Okusyunbetu wich the electromagnetic seismographs during the period of Feb. 14 to Mar. 1.

著者

寺島 敦 松本 利松

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.37, no.1, pp.81-88, 1984-03-25 (Released:2010-03-11)

参考文献数

11

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In June and August of 1980 two separate swarms of microearthquakes occurred in the proximity of the Tavera Reservoir, Dominican Republic. The earthquakes were located along the Tavera Fault that runs through Tavera Reservoir. These swarms were observed after abrupt changes of water level occurred. A gradual increase of water level during the period of September through November, however, did dot produce induced earthquakes except sporadic events despite the fact that the highest water level surpassed the peak elevations of two abrupt changes. It was inferred from these observations that the induced seismicity was sensitive to the abrupt changes, especially a rapid draw-down of water level rather than or in addition to the water level itself. The foci of the second swarm in August was distributed adjacent to the area occupied by the first swarm in June, implying that the rock fracture propagated from one zone to another during these two active swarm sequences.