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地震 ›› 2002, Vol. 22 ›› Issue (3): 45-50.

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西北地区东部强震前地震活动演化特征

任雪梅, 马禾青, 赵卫明, 康凌燕, 延海军   

  1. 宁夏回族自治区地震局,宁夏银川 750001
  • 收稿日期:2001-10-30 修回日期:2002-01-08 出版日期:2002-07-31 发布日期:2021-12-21
  • 作者简介:任雪梅(1968-),女,四川崇州市人,工程师,主要从事地震地质、地震活动性和地震预报研究。

The evolutional features of seismic activity before strong earthquakes ineastern part of Northwest China region

REN Xue-mei, MA He-qing, ZHAO Wei-ming, KANG Ling-yan, YAN Hai-jun   

  1. Seismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China
  • Received:2001-10-30 Revised:2002-01-08 Online:2002-07-31 Published:2021-12-21

摘要: 通过对1900年以来西北地区东部10次强震前不同时间尺度的地震分布特征以及演化过程的研究表明,西北地区东部强震前大多存在以下规律: 即在震中附近存在5级以上地震空缺的长期异常特征及中小地震活动水平升高的中短期异常特征。

关键词: 强震, 地震空缺, 西北地区东部, 青藏高原

Abstract: In this paper, through studyon earthquake distribution features and evolutional pro-cess of about 10 strong earthquakes occurred with different times scales in the eastern part of Northwest China region since 1900, we have found that there have existed the following law before strong earthquake in the region, i. e. there have existed longtermanomalous features of earthquake deficiency larger than 5 magnitude nearthe epicenters and mid-short-termanom a-lous features of rising of moderate-small earthquake activity level.

Key words: Strong earthquake, eastern part of Northwest China region, Tibet Plateau, Earthquake deficiency

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