2012年云南宁蒗5.7级地震前兆异常特征
|
摘要
以2012年6月24日宁蒗5.7级地震为例,结合滇西北地区其他地震的前兆反映,对地震前永胜、丽江、云龙、楚雄、弥渡、洱源等台站前兆仪器记录到的不同程度异常信息特征进行综合分析,发现这些异常不仅有清晰的短临指标和明显的同步性,一些异常还有完整的短期变化过程。依据这些异常形态、异常幅度、异常持续时间及成因,异常特征基本上可以归纳为3种类型:即震前持续、震后恢复的短期趋势异常;同步性的短临异常;"震前扰动"短临及临震异常。
Taking the Ninglang M5.7 earthquake on June 24, 2012 as an example, and combining with the precursor reflections of other earthquakes in Northwestern Yunnan, the characteristics of anomalous information recorded by precursor instruments at Yongsheng, Lijiang, Yunlong, Chuxiong, Midu and Eryuan stations before the earthquake were comprehensively analyzed. It is found that these anomalies not only have clear short-impending indicators and obvious synchronization, but also have complete short-term change processes. According to these anomalous forms,anomalous amplitudes, anomalous duration and causes, the anomalous characteristics can be basically summarized into three types: short-term anomalies of pre-earthquake continuity and post-earthquake recovery; impending earthquake anomalies of synchronism; short-term and impending earthquake anomalies of "pre-earthquake disturbance".
Taking the Ninglang M5.7 earthquake on June 24, 2012 as an example, and combining with the precursor reflections of other earthquakes in Northwestern Yunnan, the characteristics of anomalous information recorded by precursor instruments at Yongsheng, Lijiang, Yunlong, Chuxiong, Midu and Eryuan stations before the earthquake were comprehensively analyzed. It is found that these anomalies not only have clear short-impending indicators and obvious synchronization, but also have complete short-term change processes. According to these anomalous forms,anomalous amplitudes, anomalous duration and causes, the anomalous characteristics can be basically summarized into three types: short-term anomalies of pre-earthquake continuity and post-earthquake recovery; impending earthquake anomalies of synchronism; short-term and impending earthquake anomalies of "pre-earthquake disturbance".
引文
[1]陈立德,付虹.地震预报基础与实践[M].北京:地震出版社, 2003.
[2]马瑾,马胜利,刘力强.地震前异常的阶段性及其空间分布特征[J].地震地质, 1995, 17(4):363-371.
[3]牟雅元,胡德军,杨国威.宁蒗地震的应变短临异常分析[J].地震研究, 2001, 24(1):36-39.
[4]陈德福,何世海,李旭东.洞体形变在丽江7级大震前作了正确的中短期预报[J].地壳形变与地震, 1997, 17(1):112-114.
[5]常祖峰,杨盛用,周青云,等. 2012年6月24日宁蒗—盐源MS5.7地震发震构造刍议[J].地震地质, 2012, 35(1):37-49.
[6]陈绍绪,王宝坤,张跃刚.华北地区地倾斜中短期地震前兆识别及预报方法研究[J].地壳形变与地震, 1999, 19(4):8-14.
[7]薄万举,杨国华,郭良迁.地壳形变与地震预测研究[M].北京:地震出版社, 2001.
[8]国家地震局预测预防司.地壳形变分析预报方法[M].北京:地震出版社, 1998.
[9]谭金意,杨林章.地壳形变观测与分析[M].北京:地震出版社, 1998.
[10]王雪莹,刘长海,张有林,等.合肥形变台短水准测量资料趋势及震例分析[J].地震地磁观测与研究, 2003, 24(6):85-88.
[11]张艳凤,常祖峰,彭永中,等. 2014年云南盈江6.1级地震宏观异常及其与构造关联性讨论[J].地震研究, 2018, 41(1):148-155.
[12]许昭永,王贤仁,黄雍,等.倾斜扰动——一种可能的有效地震前兆[J].地震研究, 2001, 24(2):131-135.
[13]许昭永,杨润海,王彬,等.突发应变扰动——一种新的破裂前兆的实验研究[J].地震学报, 1998, 20(6):628-634.
[14]马胜利,马瑾,刘力强.典型构造变形过程中物理场时空演化的实验和理论研究[J].地震, 1995(S):55-65.
[15]付虹,倪喆.从云南地震预报实践探讨地震中短期预测的新途径[J].国际地震动态, 2017(6):2-8.
[16]张国民,张永仙,石耀霖.地震前兆复杂性的数值模拟研究[J].地震, 1994(1):2-11.
[2]马瑾,马胜利,刘力强.地震前异常的阶段性及其空间分布特征[J].地震地质, 1995, 17(4):363-371.
[3]牟雅元,胡德军,杨国威.宁蒗地震的应变短临异常分析[J].地震研究, 2001, 24(1):36-39.
[4]陈德福,何世海,李旭东.洞体形变在丽江7级大震前作了正确的中短期预报[J].地壳形变与地震, 1997, 17(1):112-114.
[5]常祖峰,杨盛用,周青云,等. 2012年6月24日宁蒗—盐源MS5.7地震发震构造刍议[J].地震地质, 2012, 35(1):37-49.
[6]陈绍绪,王宝坤,张跃刚.华北地区地倾斜中短期地震前兆识别及预报方法研究[J].地壳形变与地震, 1999, 19(4):8-14.
[7]薄万举,杨国华,郭良迁.地壳形变与地震预测研究[M].北京:地震出版社, 2001.
[8]国家地震局预测预防司.地壳形变分析预报方法[M].北京:地震出版社, 1998.
[9]谭金意,杨林章.地壳形变观测与分析[M].北京:地震出版社, 1998.
[10]王雪莹,刘长海,张有林,等.合肥形变台短水准测量资料趋势及震例分析[J].地震地磁观测与研究, 2003, 24(6):85-88.
[11]张艳凤,常祖峰,彭永中,等. 2014年云南盈江6.1级地震宏观异常及其与构造关联性讨论[J].地震研究, 2018, 41(1):148-155.
[12]许昭永,王贤仁,黄雍,等.倾斜扰动——一种可能的有效地震前兆[J].地震研究, 2001, 24(2):131-135.
[13]许昭永,杨润海,王彬,等.突发应变扰动——一种新的破裂前兆的实验研究[J].地震学报, 1998, 20(6):628-634.
[14]马胜利,马瑾,刘力强.典型构造变形过程中物理场时空演化的实验和理论研究[J].地震, 1995(S):55-65.
[15]付虹,倪喆.从云南地震预报实践探讨地震中短期预测的新途径[J].国际地震动态, 2017(6):2-8.
[16]张国民,张永仙,石耀霖.地震前兆复杂性的数值模拟研究[J].地震, 1994(1):2-11.