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地震 ›› 2014, Vol. 34 ›› Issue (1): 118-124.

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郯庐断裂带南段加卸载响应比变化特征分析

缪鹏, 王行舟, 李玲利, 翟洪涛, 洪德全, 王俊   

  1. 安徽省地震局, 安徽 合肥 230031
  • 发布日期:2020-07-20
  • 作者简介:缪鹏(1982-), 男, 江苏盐城人, 2010年硕士研究生毕业, 主要从事地球物理及地震活动性等研究。
  • 基金资助:
    安徽省地震科研基金青年项目(20130702)和安徽省自然科学基金项目(10040606Q24)资助

Variation Characteristics of Load-unload Response Ratio in the Southern Tanlu Fault Zone

MIAO Peng, WANG Xing-zhou, LI Ling-li, ZHAI Hong-tao, HONG De-quan, WANG Jun   

  1. Earthquake Administration of Anhui Province, Hefei 230031, China
  • Published:2020-07-20

摘要: 本文对郯庐断裂带南段开展了分段加卸载响应比变化研究,总结了区域内显著地震前加卸载响应比时序曲线的变化特征。研究表明,加卸载响应比表征了地下介质的损伤程度,具有明确的物理意义,在实际应用中取得了较好的效果。在中小地震较为丰富的研究区域,加卸载响应比在显著地震前会出现短临高值异常; 而在中小地震活动水平不高的区域,加卸载响应比在震前更多地表现为长期的背景高值异常。

关键词: 加卸载响应比, 时序特征, 扫描窗长, 郯庐断裂带南段

Abstract: In this paper, we studied the variation of load-unload response ratio (LURR) in the southern Tanlu fault zong, and summarize the timing curve characteristics before some significant earthquakes in this area. The results reveal that the load-unload response ratio, which represents the extent of the subsurface damage, has a clear physical meaning and can give good results in practical applications. It was found that LURR has short-term high value anomaly before some significant earthquakes in the areas of high seismic activity level of medium and small earthquakes. However, LURR mainly shows long-term background high value anomalies in other areas.

Key words: Load-unload response ratio (LURR), Timing curve characteristics, Scanning window length, Southern Tanlu fault zone

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