著者

岡村 行信 倉本 真一 大竹 政和 平 朝彦 太田 陽子 石川 有三 鷺谷 威 加藤 幸弘 下川 浩一 粟田 泰夫

出版者

一般社団法人 日本地質学会

雑誌

日本地質学会学術大会講演要旨 (ISSN:13483935)

巻号頁・発行日

vol.1999, 1999

著者

石川 有三 松村 一男 横山 博文 松本 英照

出版者

Japan Society of Geoinformatics

雑誌

情報地質 (ISSN:0388502X)

巻号頁・発行日

vol.1985, no.10, pp.19-34, 1985-08-31 (Released:2010-02-26)

参考文献数

17

被引用文献数

21

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SEIS-PC is a BASIC program system for interactive analyzing for seismicity with graphic display by a 16-bit personal computer ; NEC PC-9801 series. The system is composed of 6 programs as followed: 1) seismicity analysis, 2) making the random file of hypocenter catalogue, 3) adding hypocenters to the random file, 4) making map-file, 5) printing the parameters of hypocenters, and 6) shoeing the saved screen-image. The program of the seismicity analysis will help researchers to get figures of b-value, magnitude-time, number-time depth-time, space-time, cross-section, e.t.c..

著者

石川 有三 尾池 和夫

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.35, no.2, pp.171-181, 1982-06-25 (Released:2010-03-11)

参考文献数

31

被引用文献数

3

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Ten reservoir induced earthquakes were investigated. The relation between the dam height and the maximum magnitude of the induced earthquake was found. We show that there are the magnitude limit of earthquake related with the dam height. The Shenwo earthquake, this was only one exception of this relation, wasn't far from the 1975 Haicheng earthquake. It occurred only 43 days before the Haicheng earthquake. We think the Shenwo earthquake occurred in the precursory period of the Haicheng earthquake. So we concluded that it occurred under the special tectonic condition just before the large earthquake.Fault plane solutions for reservoir induced earthquakes were also compared with those for natural ones. We got the result that the directions of P-axis and T-axis for induced earthquakes were not always same to those for natural ones. So, we concluded that induced earthquakes occurred in the faults which were weakened by the permeated water rather than in the faults which were easily dislocated by the tectonic force. Large aftershocks of the Xinfengjiang earthquake were investigated and we showed the examples of the shock induced by loading and unloading.The b-values for the aftershocks of induced earthquakes were calculated, but we got only one b-value for natural one which could be compared to induced one and there was no significant difference between them.

著者

趙 志新 松村 一男 尾池 和夫 石川 有三

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.40, no.3, pp.383-396, 1987-09-25 (Released:2010-03-11)

参考文献数

23

被引用文献数

4 4

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Mutual relations of seismicity in the long period in various regions from North China to Japan trench in East Asia have been analyzed. Time series of events were analyzed in various regions in North China, Korean Peninsula and Japan Island.The seismicity of each region was high in the period from 1550 to 1700. Then quiet period had been lasting until 1900. From 1900 the active period began again and have continued up to the present.Impulsive activities were found in the western part of North China and Japan Islalds in a short time range around 1830 during the quiet period. It seems that short period variations superpose on the long period variation. These short period variations in two regions also correlated to each other.Synchronous variations of seismicity in these regions are implicated in the formation of earthquake generating stress fields from North China to Japan trench under the common tectonic conditions. The release and the accumulation of stresses correspond to the active and quiet period of seismicity, respectively.Correlations among seismicities and stress fields from North China to Japan trench suggest that there is a transmission of the tectonic force from the subduction of the pacific plate along the Japan trench to North China through Korean Peninsula.

著者

石川 有三

出版者

Tokyo Geographical Society

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.110, no.4, pp.592-601, 2001-08-25 (Released:2009-11-12)

参考文献数

26

被引用文献数

4 5

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The shape of the Philippine Sea slab beneath southwest Japan was investigated using the hypocenter distribution and the fault plane solutions obtained by Japan Meteorological Agency. Two seismic belts were found in an equal depth section of the slab and these did not relate to the double seismic zone in the subducting slab. Then, the existence of a broken off piece of slab was proposed beneath Kii channel. This piece collided with Philippine Sea slab and created a high seismicity area at each side.Three events that were not located at a high seismic area in the slab were found. Two were considered to be the events that occurred at the near aseismic part of the slab. The other may have occurred at another broken off piece of the slab.

著者

石川 有三

出版者

日本地質学会

雑誌

地質学論集 (ISSN:03858545)

巻号頁・発行日

no.40, pp.205-218, 1992-12-15

被引用文献数

1

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世界各地のプレート境界やブロック境界である大きな横ずれ断層における地震活動を調べ, 中央構造線の周辺部の地震活動と比べた。その結果, 中央構造線は他の断層に比べ地震活動が低いが, 歴史時代に大きな地震があった可能性があること, 地震活動の空間分布の特徴や応力場が中央構造線を境として両側で異なることなどが明らかになり, 中央構造線はブロックの境界として振舞っていると結論した。特に, 東アジアの中での地震活動や応力場から見た中央構造線は, アムールプレートの南の境界とは考えにくい。