滇东北M_S≥5.0地震前地下流体异常特征与2014年云南鲁甸6.5级地震研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
在对滇东北地区地下流体观测资料进行综合评估的基础上,选择评估达到Ⅰ、Ⅱ类的观测资料,采用日值、五日均值、旬均值、相关矩平、K-L拟合分析、CF分析等方法,对2003~2012年以来滇东北地区的5组MS≥5.0地震进行震例回顾总结。归纳震前该区地下流体前兆异常的时空演化特征,发现前兆异常数量在时间上具有阶段性,异常项数在震前6个月开始增多,震前3个月达到最大值,临震前1个月部分异常转折结束,异常数量出现降低;异常在空间演化上具有震前3个月向震中收缩的特点。80%的震例表明震中距100 km范围内的观测点异常比例远高于100 km范围外的观测点异常比例。将结果外推应用于2014年8月3日鲁甸6.5级地震,发现他们具有较好的一致性,表明滇东北地区MS≥5.0地震前地下流体的异常特征具有普适性。
Based on a comprehensive evaluation about the underground fluid observation data in Northeast Yunnan area,we selected the observation data whose evaluation achieved class I and II,and reviewed and summarized five groups of MS≥5 earthquakes from 2003 to 2012 to conclude the temporal spatial evolution characteristics of precursory anomalies of underground fluid in the study area by using the method of the daily value,the mean value of five days,the mean value of ten days,correlation departure,K- L fitting analysis,CF analysis. The results showthat the quantity of precursory anomaly varied with stages in time. The abnormal items began to increase in the six months and reached a maximum value in the three months before the earthquake,however,some abnormal items turned over and the abnormal quantity decreased in the one month before the earthquake. The spatial evoluation characteristic of precursory anomaly was concentrating from outside to the epicenter in the three months before earthquake. The 80% earthquake cases showthat the proportion of precursory anomaly of observation points within 100 km from the epicenter is far higher than that outside 100 km from the epicenter. The result was used for Yunnan Ludian MS6. 5 earthquake on Aug. 3,2014,we found that they have good consistency,which indicated that abnormal characteristics of the underground fluid before M ≥5. 0 earthquakes in the Northeast Yunnan could be applied widely
引文
陈立德,付虹.2008.强震短临前兆异常共性特征的物理基础[J].地震研究,31(2),99-102.
    范雪芳,刘耀炜,吴桂娥,等.2010.华北地区水位与水氡中期、中短期前兆异常特征研究[J].地震研究,33(2):147-158.
    非明伦,付正光,谢英情,等.2014.云南鲁甸5.1、5.0级地震震害分析[J].防灾减灾工程学报,24(4):432-440.
    非明伦,周光全,谢英情,等.2006.盐律5.1级地震现场调查与烈度分析[J].地震研究,29(4):411-417.
    付碧宏,王萍,孔屏,等.2008.四川汶川5.12大地震同震滑动断层泥的发现及构造意义[J].岩石学报,24(10):2237-2243.
    付虹,李永莉,赵小艳,等.2008.云南M≥5地震震前异常的统计特征[J].地震研究,31(4):335-339.
    付虹,王世芹,秦嘉政,等.2007.2007年5~6月滇西南地区M≥5成组地震活动中、短临异常特征及预测[J].地震研究,30(4):34-310.
    高小其,王琼,朱成英,等.2012.7级地震前地下流体前兆异判定指标的研究[J].内陆地震,26(2):125-137.
    黄雍,张建国,乔森.2002.2001年云南施甸中强震群研究[M].昆明:云南科技出版社.
    林辉,张平,唐采,等.2004.云南地区强震前兆短期综合异常特征研究[J].地震研究,24(4):113-118.
    陆远忠.2002.基于GIS的地震分析预报系统[M].成都:成都地图出版社.
    谢英情,付正兴,非明伦,等.2005.云南会泽5.3级地震构造背景及其序列活动特征[J].地震研究,28(4):408-414.
    杨晓芳,孙小龙,张涛.2013.新疆及周边7级强震前地下流体异常时空演化特征[J].内陆地震,27(2):127-134.
    张立,申玻,官致君,等.2007.盐津地震流体前兆异常分析[J].地震,27(2):121-129.
    张立.2013.2011年缅甸7.2级地震前云南地下流体异常特征分析[J].地震,33(1):119-126.
    赵慈平.2002.云南中强震的水氡前兆异常特征[J].地震研究,25(2):140-148.
    Mian Z.U.,Tozer D.C..1990.No water,no plate tectonics:convectiveheat transfer and the planetary surfaces of Venus and Earth[J].Terra Nova,2(5):455-459.
    Raleigh C.B.,Healy J.H.,Bredehoeft J.D..1976.An experiment inearthquake control at Rangely Colorado[J].Science,191(4233):1230-1237.
    Simpson D.W..1986.Triggered earthquake[J].Annual Review of Earthand Planetary Sciences,14(1):21-42.
    DB/T24-2007,地震震例总结规范[S].

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