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地震 ›› 2011, Vol. 31 ›› Issue (3): 56-63.

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甘肃地区3次中强地震前两种地震学前兆变化特征

荣代潞1,2, 李亚荣1,2   

  1. 1.兰州地球物理国家野外科学观测研究站, 甘肃 兰州 730000;
    2.中国地震局地震预测研究所兰州科技创新基地, 甘肃 兰州 730000
  • 收稿日期:2011-02-28 修回日期:2011-05-03 发布日期:2021-09-09
  • 作者简介:荣代潞(1945-), 男, 四川达州人, 研究员, 主要从事地球物理学和地震学及其应用研究。
  • 基金资助:
    中国地震局地震预测研究所基本科研业务专项(A80)

Characteristics of Two Seismological Precursors before Three Moderate-strong Earthquakes Occurred in Gansu Region

RONG Dai-lu1,2, LI Ya-rong1,2   

  1. 1. Lanzhou National Observatory of Geophysics, Gansu Lanzhou 730000, China;
    2. Lanzhou base of Institute of Earthquake Science, CEA, Gansu Lanzhou 730000, China
  • Received:2011-02-28 Revised:2011-05-03 Published:2021-09-09

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摘要： 根据Allegre的地壳介质破裂的尺度理论研究了甘肃地区近期3次中强地震前两种地震学前兆(地震空间相关长度和尾波Qc值)的变化特征。 结果表明, 在3次地震前这两种参数都表现出增长的特征, 并可用幂次率关系拟合。

关键词: 地震学前兆, 尾波Qc值, 地震空间相关长度, 甘肃地区

Abstract: In this paper we studied the characteristics of two seismological precursors (seismic spatial correlation length and coda Qc) associated with three moderate-strong earthquakes occurred in Gansu province , China, based on Allegre′s scale-rule theory of rock fracture. The results show that an increasing trends of seismic spatial correlation length and coda Qc appeared before the three earthquakes. A power exponent relation is used to fit the increasing variation form of these two parameters.

Key words: Seismological precursor, Coda, Seismic spatial correlation length, Gansu region

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