[1]李 莎,袁 媛,阎春恒,等.华南内陆5级以上地震前小震活动增强分析[J].华南地震,2022,(04):145-152.[doi:10.13512/j.hndz.2022.04.19]
 LI Sha,YUAN Yuan,YAN Chunheng,et al.Analysis on Small Earthquake Activity Enhancement Before Earthquakes with M≥5 in Inland South China[J].,2022,(04):145-152.[doi:10.13512/j.hndz.2022.04.19]
点击复制

华南内陆5级以上地震前小震活动增强分析()
分享到:

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年04期
页码:
145-152
栏目:
华南地区地震预测指标体系专辑
出版日期:
2022-12-10

文章信息/Info

Title:
Analysis on Small Earthquake Activity Enhancement Before Earthquakes with M≥5 in Inland South China
文章编号:
1001-8662(2022)04-0145-08
作者:
李 莎袁 媛阎春恒向 巍
广西壮族自治区地震局,南宁 530022
Author(s):
LI ShaYUAN YuanYAN ChunhengXIANG Wei
Earthquake Agency of Guangxi Zhuang Autonomous Region , Nanning 530022, China
关键词:
小震增强预测指标5级以上地震华南内陆
Keywords:
Small earthquakes enhancementPrediction indexEarthquakes with M≥5Inland South China
分类号:
P315
DOI:
10.13512/j.hndz.2022.04.19
文献标志码:
A
摘要:
对1970年以来华南内陆8次5级以上地震前小震活动增强开展分析,总结提取震前的小震活动增强的共性特征,并给出了震前小震增强跟踪策略。1970年以来华南内陆8次5级以上地震前均出现较显著小震活动增强现象,小震活动增强可作为华南内陆震情跟踪的一项重要预测指标;震前小震活动以增强—平静—发震为主,1970—2010年和2011—2021年5级以上地震前分别出现ML≥3.0和ML≥2.5地震集中增强,且至少发生一次ML≥4.0地震;东南沿海地震带西段5级以上地震的优势发震时段是增强结束后6.5个月内,东南沿海地震带东段和右江地震带为19~33个月内;目标地震一般发生在地震集中增强/活跃区及周边地区;今后应加强华南内陆ML≥2.5地震集中增强/活跃及其时空演化现象的跟踪研判。
Abstract:
This paper analyzes the enhancement of small earthquakes before 8 earthquakes with M≥5 in inland South China since 1970, summarizes and extracts the common characteristics of the enhancement of small earthquakes before earthquakes, and gives the enhancement tracking strategy of small earthquakes before earthquakes. There has been enhancement increase of small earthquakes before 8 earthquakes with M≥5 in inland South China since 1970,the enhancement of small earthquakes can be used as an important prediction index for earthquake tracking in inland South China. Before the earthquake, the activity of small earthquakes is mainly enhanced-calm-seismogenic. From 1970 to 2010 and from 2011 to 2021,there were concentrated enhancement of earthquakes with ML≥3.0 and ML≥2.5 before the earthquakes with ML≥5.0, and at least one earthquake with ML≥4.0 occured. The dominant period for earthquakes with M≥5 in the west section of the southeastern coastal seismic belt is within 6.5 months after the end of enhancement, while that in the east section of the southeastern coastal seismic belt and the Youjiang seismic belt is within 19-33 months. The target earthquakes generally occur in the earthquake concentrated enhancement or active area and the surrounding areas. In the future, it is necessary to strengthen the tracking research and judgment of the concentrated enhancement or activity and spatio-temporal evolution of earthquakes with ML≥2.5 in inland South China.

参考文献/References:

[1] 梅世蓉. 中国的地震活动性[J]. 地球物理学报,1960,9 (1):1-19.
[2]张国民.地震预报引论[M].北京:科学出版社,2001.
[3]焦远碧,丁鉴海.中等地震活动增强作为强震标志的研究[J].地震,2000,20(2):15-19.
[4]沈繁銮,符干,袁锡文,等.华南中强震前区域区域地震活动增强平静特征[J].华南地震,2003,23(3):11-15.
[5]杨向东,刘特培.中等地震对华南中强地震的指示意义[J].地震地磁观测与研究,2004,25(3):42-47.
[6]冯建刚,周龙泉,杨立明,等.青藏块体东北缘中强地震前小震频度异常研究[J].地震,2009,29(3):19-26.
[7]郑萍,张慧,沈凡銮. 2000年以来华南ML≥5级地震前的地震活动特征[J].华南地震,2018,38(1):101-107.
[8]郑萍,张慧,沈繁銮.华南已知地点信息的地震活动特征[J].震灾防御技术,2018,13(2):373-380.
[9]李莎,阎春恒,周斌,等. 2016年广西苍梧MS5.4地震前地震活动图像演化特征[J].华北地震科学,2020,38(3):19-26.
[10]刘蒲雄,陈兆恩,张伟,等.大震前地震活动图像演变及中期向短期过渡的地震活动性标志[J].地震,1997,17 (2):113-125.
[11]周军学,聂高众,谭劲先,等. 2016年7月31日广西苍梧5.4级地震灾害特征分析[J]. 地震地质,2017,39(4):780-792.
[12]袁媛,聂冠军,李蕾,等.北流MS5.2和靖西MS5.2地震震害特征对比[J].华北地震科学,2020,38(S2):109-113.
[13] Woessner J,Wiemer S. Assessing the quality of earthquaker catalogs:estimating the magnitude of completeness and its uncertainties[J]. Bull Seism Soc Am,2005,95(4):684-698.
[14]周峥嵘,吕坚,周斌,等.华南地区地震预测指标体系[M].北京:地震出版社,2021.
[15]张忠利.右江地震带潜在震源区空间分布函数不确定性对地震危险性的影响[J].防灾科技学院学报,2015,17 (3):30-36.
[16]吕坚,高建华,刘吉夫,等. 1987年寻乌地震前的地震活动性异常特征及其相关讨论[J].华南地震,2002,22(4):28-33.
[17]黄莉菁,黄昭,郑师春. 1987年8月2日江西省寻乌MS5.5级地震的震害与烈度分布[J].华南地震,2002,22(4):1-8.
[18]汤兰荣,吕坚,曾新福.赣南及邻区的地震活动特征[J].华北地震科学,2017,35(2):82-88.
[19]周依,阎春恒,向巍,等. 2016年7月31日广西苍梧MS 5.4地震震源参数[J].地震地质,2019,41(1):150-161.
[20]廖丽霞,林稚颖,莫佩婵,等.粤桂琼流体台网对区域中强地震的映震能力分析[J].地震研究,2022,45(2):110-119.

相似文献/References:

[1]倪晓寅,洪旭瑜.华南地区地磁预测方法预测指标体系的初步应用[J].华南地震,2022,(04):60.[doi:10.13512/j.hndz.2022.04.09]
 NI Xiaoyin,HONG Xuyu.Preliminary Application of Prediction Index System of Geomagnetic Prediction Method in South China[J].,2022,(04):60.[doi:10.13512/j.hndz.2022.04.09]
[2]廖丽霞,秦双龙,莫佩婵.华南流体预测指标提取及应用实例[J].华南地震,2022,(04):67.[doi:10.13512/j.hndz.2022.04.10]
 LIAO Lixia,QIN Shuanglong,MO Peichan.Extraction and Application of Fluid Prediction Index in South China[J].,2022,(04):67.[doi:10.13512/j.hndz.2022.04.10]
[3]袁丽文.华南地区地震危险性判定综合指标的分析与应用[J].华南地震,2022,(04):78.[doi:10.13512/j.hndz.2022.04.11]
 YUAN Liwen.Analysis and Application of Comprehensive Indicators for Seismic Hazard Determination in South China[J].,2022,(04):78.[doi:10.13512/j.hndz.2022.04.11]

备注/Memo

备注/Memo:
收稿日期:2022-02-10
基金项目:地震科技星火项目计划(XH22004YA)和广西局科研合同制项目(202102)联合资助。
作者简介:李莎(1989-),女,工程师,主要从事地震监测预报。
通信作者:袁媛(1978-),女,高级工程师,主要从事地震监测预报。E-mail:554562670@qq.com
更新日期/Last Update: 2022-12-10