1998年嵊州4.0级地震及其前兆特征
|
摘要
介绍了１９９８年８月１７日在浙江省嵊州市ＭＳ４．０地震的地震地质背景、震源机制和前兆特征。根据震源机制解和宏观等震线长轴方向推断这次地震的破裂方向为Ｎ６３°Ｗ，与孝丰－三门断裂带走向一致。嵊州地震震中烈度为Ⅴ度强。地震发生时嵊州市和新昌县普遍有感，少数建筑物遭到损坏，河堤和道路出现几十米长的狭窄裂缝。
An earthquake (M S4.0) occurred in Shengzhou city of Zhejiang Province on Aug.17, 1998. The seismogeological background, focal mechanism, and the precursory characteristics of this earthquake are described in this paper. Based on the fault plane solution of the earthquake foci and the direction of long axis of isoseimic line, the rupture direction of this earthquake is concluded as N63°W, which is coincident with strike of the Xiaofeng Sanmen active fault. The epicentral intensity of Shengzhou earthquake is higher than V. When the earthquake occurred, many people felt stronger ground shake. A few of buildings were damaged. Some narrow fissures with a length of 20～30 m appeared on the riverbank and the roads. This is an earthquake for which a short term prediction has been made.
An earthquake (M S4.0) occurred in Shengzhou city of Zhejiang Province on Aug.17, 1998. The seismogeological background, focal mechanism, and the precursory characteristics of this earthquake are described in this paper. Based on the fault plane solution of the earthquake foci and the direction of long axis of isoseimic line, the rupture direction of this earthquake is concluded as N63°W, which is coincident with strike of the Xiaofeng Sanmen active fault. The epicentral intensity of Shengzhou earthquake is higher than V. When the earthquake occurred, many people felt stronger ground shake. A few of buildings were damaged. Some narrow fissures with a length of 20～30 m appeared on the riverbank and the roads. This is an earthquake for which a short term prediction has been made.
引文
1 姚立珣,虞雪君,陈乃其.鄞县ML3.9和ML4.7地震的震源参数.地震学刊,1996(3):1～5
2 Okuda S,OuchiT,Terashim a T. Deviation of m agnitude frequency distribution of earthquakes fromthe Gutenberg- Richter low :Detection of precursory anom olies prior to large- earthquakes.Phsysicsofthe earth and planetary interiors,1992,73(2):229～238
3 虞雪君,冯德益,姚立珣,等.利用b、C、η探讨中强震短期预报.见:国家地震局预测预防司编.地震短临预报的理论和方法.北京:地震出版社,1997,120～126
4 尹祥础,陈学忠,宋治平,等.加卸载响应比:一种新的地震预报方法.地球物理学报,1994,37(6):766～774
5 K Mogi.The relation betw een the duration oflong- term precursors and m agnitude ofthe subsequenteearthquake .Tectonophysics,1987,(142):163～172
2 Okuda S,OuchiT,Terashim a T. Deviation of m agnitude frequency distribution of earthquakes fromthe Gutenberg- Richter low :Detection of precursory anom olies prior to large- earthquakes.Phsysicsofthe earth and planetary interiors,1992,73(2):229～238
3 虞雪君,冯德益,姚立珣,等.利用b、C、η探讨中强震短期预报.见:国家地震局预测预防司编.地震短临预报的理论和方法.北京:地震出版社,1997,120～126
4 尹祥础,陈学忠,宋治平,等.加卸载响应比:一种新的地震预报方法.地球物理学报,1994,37(6):766～774
5 K Mogi.The relation betw een the duration oflong- term precursors and m agnitude ofthe subsequenteearthquake .Tectonophysics,1987,(142):163～172
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心