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地震 ›› 2004, Vol. 24 ›› Issue (2): 47-52.

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地震时、 空分布均匀度研究探讨

盛菊琴1, 赵卫明2, 马禾青2, 金春华2   

  1. 1.中国地震局兰州地震研究所, 甘肃 兰州 730000;
    2.宁夏回族自治区地震局, 宁夏 银川 750001
  • 出版日期:2004-04-30 发布日期:2021-11-29
  • 作者简介:盛菊琴(1972-), 女, 宁夏永宁人, 工程师, 2001年在读硕士研究生, 主要从事地震预报等研究。
  • 基金资助:
    “十五”国家科技攻关项目(2001BA601B01-03-04)

Exploration of study method on uniformity degree of earthquake space-time distribution

SHENG Ju-qin1, ZHAO Wei-ming2, MA He-qing2, JIN Chun-hua2   

  1. 1. Lanzhou Institute of Seismology, CSB, Lanzhou 730000;
    2. Seismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China
  • Online:2004-04-30 Published:2021-11-29

摘要: 强震在孕育过程中, 在一定的时空范围内多数伴随大量的地震时空集中活动。 在前人研究的基础上, 提出了含义明确、 适用性好的刻画地震时、 空分布均匀程度的定量参数Ct和Cd。 研究了宁夏及邻区的5个MS≥5.5地震, 以及我国华北的4个MS≥6.0的地震, 发现震前几个月或1年左右, Ct和Cd值有一明显的异常上升过程, 表明震前地震在时间、 空间分布上有明显的集中过程。

关键词: 地震时间分布, 空间分布, 均匀度

Abstract: During the seismogenic process of strong earthquakes the space-time centralized activity in a definite space-time range is always accompanied. Two quantitive parameters with clear meaning and fine applicability to describe the earthquake space-time uniformity degree have been given on the basis of previous works. Through the study on 5 earthquakes with MS≥5.5 occurred in Ningxia and its neighboring region and 4 earthquakes with MS≥6.0 occurred in North china, it is showed that there exists obviously abnormal rise process of Ct and Cd value in couple mouths or around one year before main shocks, indicating that there exists obviously centralized process in earthquake space-time distribution before strong shocks.

Key words: Earthquake time distribution, Space distribution, Uniformity degree

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