甘肃及其边邻地区断层形变特征强度时序变化与强震关系
|
摘要
利用甘肃及其边邻地区20世纪80年代末至2009年11月跨断层短水准流动观测资料,提取相关断裂带各段的断层形变特征强度指标,分析其可能揭示的构造变形动态演化特征及与资料积累以来MS5.8级以上地震孕育—发生过程的关系。研究表明:各断裂段断层形变特征强度时序曲线对其内、边缘附近MS5.8级以上地震反映较好,震前数月至1年左右时间内多数对应与构造背景一致的逆断异常;震后异常消失,或者出现短暂的正断异常,反映调整状态。
Using cross-fault mobile short-leveling observational data from late 1980s to November 2009in Gansu and its neighborhood,the deformation feature intensity of related fault segments are computed,the dynamic evolution features and their relationship with the generation of earthquakes over MS5.8are studied.It is concluded that the time-curves of deformation feature intensity of all segments reflected the earthquakes over MS5.8on the faults or nearby,displaying thrust abnormity in accordance with their tectonic background from several months to about one year before the earthquakes.After these earthquakes,the abnormity disappeared,or appeared just as transitory normal abnormity(adjustment state).
Using cross-fault mobile short-leveling observational data from late 1980s to November 2009in Gansu and its neighborhood,the deformation feature intensity of related fault segments are computed,the dynamic evolution features and their relationship with the generation of earthquakes over MS5.8are studied.It is concluded that the time-curves of deformation feature intensity of all segments reflected the earthquakes over MS5.8on the faults or nearby,displaying thrust abnormity in accordance with their tectonic background from several months to about one year before the earthquakes.After these earthquakes,the abnormity disappeared,or appeared just as transitory normal abnormity(adjustment state).
引文
[1]车兆宏,刘善华,刘天海.用流动形变观测判定强震地点的研究.地壳形变与地震,1996,16(1):46-51
[2]江在森,祝意青.永登5.8级地震孕育发生过程中的断层变形与重力场动态图象特征.地震学报,1998,20(3):262-271
[3]江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测.北京:地震出版社,2001:44-46,87-105
[4]王双绪,江在森,陈文胜,等.景泰5.9级地震的断层形变异常及中短期预报.地震学报,2001,23(2):151-158
[5]薄万举,刘广余,陈兵,等.青藏块体东北缘地区断层形变研究.西北地震学报,2005,25(7):199-204
[6]陈兵,江在森,赵振才.中国西部断层形变趋势异常特征与地震活动关系研究.中国地震,2000,16(1):77-85
[7]薄万举,周硕愚,王彦.四点组斜率信息标准化方法的进一步应用及其物理意义的探索.四川地震,1995,5:24-30
[8]薄万举.信息流合成方法在震情分析研究中的应用.西北地震学报,1997,19(2):41-47
[9]薄万举,谢觉民,罗三明.前兆信息提取的一种新方法斜率差信息法.地震学报,2001,23(2):159-166
[10]周硕愚,韩健,宋永厚,等.断层网络形变前兆学原理与应用.地壳形变与地震,1990,10(1):1-12
[11]宋永厚,周硕愚,张荣富.首都圈断层网络群体形变异常与地震预报.地壳形变与地震,1990,10(4):8-14
[12]张希,江在森,陈文胜,等.我国西部近期应变强度比动态演化特征.地震研究,2001,24(2):115-120
[13]张希,江在森,陈文胜,等.川滇地区应变强度比动态图像分析.高原地震,1999,11(3):15-21
[14]张希,江在森,王双绪,等.断层形变的应变强度比动态图像与震例综合研究.地壳形变与地震,2001,21(2):37-42
[15]张希,薛富平,王双绪,等.大姚、民乐-山丹地震前的中短期前兆.大地测量与地球动力学,2004,24(4):57-63
[16]张希,薛富平,王继英,等.青藏块体东北缘主要断裂带断层形变时序特征与强震关系.地震研究,2009,32(1):1-5
[17]郭良迁.华北地区断层形变异常强度与地震的关系.灾害学,2008,23(4):11-16,20
[2]江在森,祝意青.永登5.8级地震孕育发生过程中的断层变形与重力场动态图象特征.地震学报,1998,20(3):262-271
[3]江在森,丁平,王双绪,等.中国西部大地形变监测与地震预测.北京:地震出版社,2001:44-46,87-105
[4]王双绪,江在森,陈文胜,等.景泰5.9级地震的断层形变异常及中短期预报.地震学报,2001,23(2):151-158
[5]薄万举,刘广余,陈兵,等.青藏块体东北缘地区断层形变研究.西北地震学报,2005,25(7):199-204
[6]陈兵,江在森,赵振才.中国西部断层形变趋势异常特征与地震活动关系研究.中国地震,2000,16(1):77-85
[7]薄万举,周硕愚,王彦.四点组斜率信息标准化方法的进一步应用及其物理意义的探索.四川地震,1995,5:24-30
[8]薄万举.信息流合成方法在震情分析研究中的应用.西北地震学报,1997,19(2):41-47
[9]薄万举,谢觉民,罗三明.前兆信息提取的一种新方法斜率差信息法.地震学报,2001,23(2):159-166
[10]周硕愚,韩健,宋永厚,等.断层网络形变前兆学原理与应用.地壳形变与地震,1990,10(1):1-12
[11]宋永厚,周硕愚,张荣富.首都圈断层网络群体形变异常与地震预报.地壳形变与地震,1990,10(4):8-14
[12]张希,江在森,陈文胜,等.我国西部近期应变强度比动态演化特征.地震研究,2001,24(2):115-120
[13]张希,江在森,陈文胜,等.川滇地区应变强度比动态图像分析.高原地震,1999,11(3):15-21
[14]张希,江在森,王双绪,等.断层形变的应变强度比动态图像与震例综合研究.地壳形变与地震,2001,21(2):37-42
[15]张希,薛富平,王双绪,等.大姚、民乐-山丹地震前的中短期前兆.大地测量与地球动力学,2004,24(4):57-63
[16]张希,薛富平,王继英,等.青藏块体东北缘主要断裂带断层形变时序特征与强震关系.地震研究,2009,32(1):1-5
[17]郭良迁.华北地区断层形变异常强度与地震的关系.灾害学,2008,23(4):11-16,20
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心