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地震 ›› 1999, Vol. 19 ›› Issue (4): 365-371.

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1998年嵊州4.0级地震及其前兆特征

姚立‘, 虞雪君, 张士印, 陈学庭, 杨钢宇   

  1. 中国杭州 310013 浙江省地震局
  • 收稿日期:1999-01-18 修回日期:1999-03-30 出版日期:1999-10-31 发布日期:2022-09-23
  • 作者简介:姚立?,男, 1945年2月出生,研究员,主要从事震源物理、地震分析预报等研究工作。

SHENGZHOU MS4. 0 EARTHQUAKE (AUG. 17, 1998) AND ITS PRECURSORY FEATURES

Yao Lixun, Yu Xuejun, Zhang Shiyin, Chen Xueting, Yang Gangyu   

  1. Seismological Bureau of Zhejiang Province, Hangzhou 310013, China
  • Received:1999-01-18 Revised:1999-03-30 Online:1999-10-31 Published:2022-09-23

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摘要： 介绍了1998年8月17日在浙江省嵊州市MS 4. 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。

关键词: 震源机制, 地震前兆, 短期预报, 嵊州地震

Abstract: An earthquake (MS 4. 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 is oseimic line, the rupture direction of this earthquake is concluded as N 63°W, which is coincident with strike of the Xiaofeng-Sanmen active fault. The epicentral intensity of Sheng zhou earthquake is higher than V. When the earthquake occurred, many people felt strong erground 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.

Key words: Focal mechanism, Seismic precursor, Short-term prediction, Shengzhou earthquake