[1]徐声鑫,王 岩,辜有启.云南地区GPS 面膨胀格网异常动态变化与M ≥5.0 地震关系分析[J].华南地震,2020,40(03):6-16.[doi:10.13512/j.hndz.2020.03.02]
　XU Shengxin,WANG Yan,GU Youqi.Analysis of the Relationship between the Anomalous Dynamic Change of GPS Surface Expansion Grid and the Earthquakes with M ≥5.0 in Yunnan[J].SOUTH CHINA JOURNAL OF SEISMOLOGY,2020,40(03):6-16.[doi:10.13512/j.hndz.2020.03.02]
点击复制

云南地区GPS 面膨胀格网异常动态变化与M ≥5.0 地震关系分析()
分享到：

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2020年03期
页码:
6-16
栏目:
地震科学研究
出版日期:
2020-09-30

文章信息/Info

Title:
Analysis of the Relationship between the Anomalous Dynamic Change of GPS Surface Expansion Grid and the Earthquakes with M ≥5.0 in Yunnan
作者:
徐声鑫 ;  王 岩 ;  辜有启
云南省地震局 , 昆明 650041
Author(s):
XU Shengxin; WANG Yan; GU Youqi
Yunnan Earthquake Agency, Kunming 650041, China
关键词:
GPS 面膨胀; 格网异常; 动态变化
Keywords:
GPS surface expansion; Grid anomaly; Dynamic change
分类号:
P315；P227
DOI:
10.13512/j.hndz.2020.03.02
文献标志码:
A
摘要:
基于 2011—2014 年云南地区 GPS 连续观测资料 , 利用高精度数据处理软件（GAMIT/GLOBK）处理 后获得位移场 , 对位移场进行网格化插值获得均匀分布于 56 个网格的位移场。基于每个网格位移场时间序 列求取其面膨胀时间序列 , 对去除趋势项后的面膨胀时间序列 , 设定二倍标准差作为异常阈值。以 2011 年 6 月 20 日腾冲 5.2 级、2014 年 8 月 3 日鲁甸 6.5 级、2014 年 5 月 24、30 日盈江 5.6、6.1 级和 2013 年 3 月 3 日洱源 5.5 级地震为样本 , 对地震孕育过程中面膨胀格网异常的空间分布和时间尺度的变化走势进行分析。 结果表明 :5 次地震前云南地区的面膨胀格网异常存在大区域的动态变化 , 且震前相对集中 , 面膨胀异常格 网分布相对集中的区域可作为未来地震发生地点的参考性指标；从 5 次地震的震中位置和异常格网的分布状 况来看 ,5 次地震震中都没有位于异常格网内 , 而是位于异常格网边缘 , 这表明面膨胀异常区边缘可能更加 危险。
Abstract:
Abstract:Based on the GPS continuous observation data of Yunnan area from 2011 to 2014,the displacement field was obtained by processing with high-precision data processing software (GAMIT / GLOBK),and the displacement field was grid-interpolated to obtain a displacement field uniformly distributed on 56 grids. The surface expansion time series of each grid displacement field is calculated based on the time series of the displacement field. For the surface expansion time series after removing the trend term,a double standard deviation is set as the abnormal threshold. Taking the Tengchong MS 5.2 earthquake on June 20th 2011,Ludian MS 6.5 earthquake on August 3rd,2014,Yingjiang MS 5.6 and MS 6.1 earthquakes on May 24th and 30th,2014 and Eryuan MS 5.5 earthquake on March 3rd,2013 as samples,the paper analyzes the spatial distribution and time-scale change trend of the surface expansion grid anomaly during earthquake preparation. The results show that:before the five earthquakes,the surface expansion lattice anomalies in Yunnan area have dynamic changes in large areas,and they are relatively concentrated before the earthquake. The areas with relatively concentrated surface expansion and abnormal grid distribution can be used as reference for future earthquake occurrence sites. From the epicenter location of the five earthquakes and the distribution of the anomalous grid,the epicenters of the five earthquakes are not located in the anomalous grid,but at the edge of the anomalous grid,indicating that the edge of the surface expansion anomaly may More dangerous.

备注/Memo

备注/Memo:
收稿日期:2020-04-10 基金项目: 北斗地基增强系统地震行业分系统 : 云南省地震局共享子系统建设与北斗应用实验项目（BDS-2019-YN-01）； 国家重点研发计划课题（2018YFC1503604）和李建成院士工作站（2015IC015）共同资助 作者简介: 徐声鑫 (1985- ), 男 , 工程师 , 主要从事 GNSS 数据处理与分析工作。 E-mail:408705228@qq.com
更新日期/Last Update: 2020-10-22