2014年云南鲁甸6.5级地震序列跟踪分析研究
|
摘要
从云南鲁甸6.5级地震序列活动特征、序列参数、历史地震活动类比、余震精定位、较大地震震源机制、发震构造分析等方面分析了鲁甸地震序列的序列类型及后续强余震预测问题。分析认为,鲁甸地震序列余震活动表现出明显的阶段性。鲁甸地震序列M≥4.0地震时间间隔遵从线性关系、精定位结果显示余震呈共轭分布、地震震源机制结果显示震源机制一致性程度较低、历史地震序列类比表明鲁甸地震序列与1974年大关7.1级地震序列活动特征类似,这些均表明鲁甸地震序列类型为主—余型。
We discuss the seismic sequence type and prediction of subsequent strong aftershocks of Ludian MS6. 5earthquake on Aug. 3,2014 through the activity characteristics,the sequence parameters,the accurate location of aftershock and the focal mechanism of the bigger earthquake of Ludian MS6. 5 earthquake sequence, the analogy with historical earthquake activity and the seismogenic structure. The result shows that the characteristic of aftershock activity of Ludian MS6. 5 earthquake sequence appeared the obvious phased. The time interval of M ≥4. 0 strong aftershocks obeys the linear relationship,and the accurate location result shows that the distribution of aftershock is conjugate. The source mechanism results showthat the consistency of focal mechanism is in the lowdegree,the results of analogy with history sequence indicate that the activity characteristic of Ludian earthquake sequence is same as that of Daguan MS7. 1 earthquake sequence in 1974. These results all make sure that the type of Ludian earthquake sequence is the mainshock-aftershock.
We discuss the seismic sequence type and prediction of subsequent strong aftershocks of Ludian MS6. 5earthquake on Aug. 3,2014 through the activity characteristics,the sequence parameters,the accurate location of aftershock and the focal mechanism of the bigger earthquake of Ludian MS6. 5 earthquake sequence, the analogy with historical earthquake activity and the seismogenic structure. The result shows that the characteristic of aftershock activity of Ludian MS6. 5 earthquake sequence appeared the obvious phased. The time interval of M ≥4. 0 strong aftershocks obeys the linear relationship,and the accurate location result shows that the distribution of aftershock is conjugate. The source mechanism results showthat the consistency of focal mechanism is in the lowdegree,the results of analogy with history sequence indicate that the activity characteristic of Ludian earthquake sequence is same as that of Daguan MS7. 1 earthquake sequence in 1974. These results all make sure that the type of Ludian earthquake sequence is the mainshock-aftershock.
引文
冯希杰,苏刚,麻水歧.1993.中国大陆共扼破裂强震[J].内陆地震,7(3):225-233.
谷继成,谢小碧,赵莉.1979.强余震的时间分布特征及其理论解释[J].地球物理学报,22(1):32-46.
顾浩鼎,陈运泰,高祥林,等.1976.1975年2月4日辽宁省海城地震的震源机制[J].地球物理学报,19(4):274-284.
何志桐,谢挺.1977.邢台地震系列空间分布、构造应力场及其发生过程的探讨[J].地球物理学报,20(2):131-141.
蒋海昆,李永莉,曲延军,等.2006.中国大陆中强地震序列类型空间分布特征[J].地震学报,28(4):289-298.
李轶群,王健.2008.唐山余震区中小地震震源机制解分区特征的初步研究[J].中国地震,24(2):150-158.
苏刚,冯希杰,麻水歧.1992.局部地区强震活动中止的可能标志—共轭破裂[J].国际地震动态,(7):1-5.
苏有锦,李忠华,赵小艳,等.2013.全球M≥7.0地震序列研究[M].昆明:云南科技出版社.
王绍晋,于利民,李钦祖.1991.利用P、S振幅比资料测定澜沧—耿马震区中、小地震震源机制[J].地震研究,14(3):195-202.
魏柏林.1980.余震震源机制变化的原因[J].地球物理学报,23(1):25-34.
易桂喜,龙锋,张致伟.2012.汶川MS8.0地震余震震源机制时空分布特征[J].地球物理学报,55(4):1213-1227.
谷继成,谢小碧,赵莉.1979.强余震的时间分布特征及其理论解释[J].地球物理学报,22(1):32-46.
顾浩鼎,陈运泰,高祥林,等.1976.1975年2月4日辽宁省海城地震的震源机制[J].地球物理学报,19(4):274-284.
何志桐,谢挺.1977.邢台地震系列空间分布、构造应力场及其发生过程的探讨[J].地球物理学报,20(2):131-141.
蒋海昆,李永莉,曲延军,等.2006.中国大陆中强地震序列类型空间分布特征[J].地震学报,28(4):289-298.
李轶群,王健.2008.唐山余震区中小地震震源机制解分区特征的初步研究[J].中国地震,24(2):150-158.
苏刚,冯希杰,麻水歧.1992.局部地区强震活动中止的可能标志—共轭破裂[J].国际地震动态,(7):1-5.
苏有锦,李忠华,赵小艳,等.2013.全球M≥7.0地震序列研究[M].昆明:云南科技出版社.
王绍晋,于利民,李钦祖.1991.利用P、S振幅比资料测定澜沧—耿马震区中、小地震震源机制[J].地震研究,14(3):195-202.
魏柏林.1980.余震震源机制变化的原因[J].地球物理学报,23(1):25-34.
易桂喜,龙锋,张致伟.2012.汶川MS8.0地震余震震源机制时空分布特征[J].地球物理学报,55(4):1213-1227.
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