地震研究

云南宾川地震信号发射台的流动观测数据服务系统及数据质量评估^*

(1.中国地震局地球物理研究所地震观测与地球物理成像重点实验室,北京 100081; 2.中国地震局滇西地震预报实验场,云南大理 671000; 3.云南省地震局,云南昆明 650224)

Data Service System and Data Quality Sssessment for Mobile Observation of Transmitting Seismic Stations in Binchuan,Yunnan

ZHANG Yunpeng¹,LI Xiaobin²,WANG Weitao¹,WANG Baoshan¹,YE Beng²,YANG Jun²,WANG Bin³

(1.Key Laboratory of Seismic Observation and Geophysical Imaging,Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)(2.Western Yunnan Earthquake Prediction Study Area,China Earthquake Administration,Dali 671000,Yunnan,China)(3.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

Keywords：large volume airgun; seismic signal; G1 database; data quality assessment; Yunnan Binchuan

备注

摘要

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参考文献

对2011年以来云南宾川地震信号发射台的实验数据进行规范化处理,整理原始Reftek数据库,构建为统一的G1数据库(MiniSEED格式),并提供SAC等数据格式的截取服务。对台站分布及数据连续性、各台站仪器类型及经纬度位置变更情况、气枪激发时刻与集中加密实验、台站背景噪声水平等进行数据质量评估,并对宾川附近天然地震分布进行了统计分析。结果表明:G1数据库是对历史数据的检验,格式与信息均可达到统一,也可作为新疆、甘肃等地主动源数据整理的模板。

We made standardized processing of the Reftek database of the transmitting seismic stations located in Binchuan from 2011,eventually we got the G1 database(MiniSEED format)and provided data interception service with the format of SAC,etc.We made data quality assessment such as the station distribution and data continuity,equipment type and position changed information,triggering time and concentrated experiments,and the ambient noise level.We also made statistical analysis of earthquake distribution.The results indicate that the G1 database is the test of historical data with uniform format and information,which can lay the foundation of further study and be the template of active source in Xinjiang,Gansu and other places.

引言
1 宾川大容量气枪震源激发与接收系统简介
2 流动台站数据规整化
3 数据质量评估
4 天然地震分布
5 结论

图1 云南宾川主动源流动台站数据规整化流程<br/>Fig.1 Data normalization flow chart of mobile stations in Binchuan,Yunnan

图1 云南宾川主动源流动台站数据规整化流程
Fig.1 Data normalization flow chart of mobile stations in Binchuan,Yunnan

表1 G1数据库仪器元信息<br/>Tab.1 Meta-information of the instrument in the G1 database

表1 G1数据库仪器元信息
Tab.1 Meta-information of the instrument in the G1 database

图2 云南宾川地震信号发射台参考台及周边流动台站位置分布<br/>Fig.2 Distribution map showing reference and mobile stations of transmitting seismic station in Binchuan,Yunnan

图2 云南宾川地震信号发射台参考台及周边流动台站位置分布
Fig.2 Distribution map showing reference and mobile stations of transmitting seismic station in Binchuan,Yunnan

表2 台站名称字母与数字的统一及字母大小写的统一<br/>Tab.2 The unity of letters and numbers,upper case and lower case of the names of mobile seismic stations

表2 台站名称字母与数字的统一及字母大小写的统一
Tab.2 The unity of letters and numbers,upper case and lower case of the names of mobile seismic stations

图3 53285台(a)、53260台(b)在G1数据库时间段内(共1 949 d)经纬度信息变更统计<br/>Fig.3 Latitude and longitude information of the 53285 station(a)and the 53260 station(b)obtained from the G1 database(1 949 days)

图3 53285台(a)、53260台(b)在G1数据库时间段内(共1 949 d)经纬度信息变更统计
Fig.3 Latitude and longitude information of the 53285 station(a)and the 53260 station(b)obtained from the G1 database(1 949 days)

表3 2012年11套Nano设备更换统计<br/>Tab.3 Replacement statistics of 11 sets of Nano equipments in 2011

表3 2012年11套Nano设备更换统计
Tab.3 Replacement statistics of 11 sets of Nano equipments in 2011

图4 53251～53285台站(a)、EY测线、参考台和部分临时台站(b)数据连续性分析
Fig.4 Continuity analysis of 53251-53285 stations(a),the EY profile,reference stations and other temporary stations(b)

表4 参考台详细信息<br/>Tab.4 Detailed information of reference stations

表4 参考台详细信息
Tab.4 Detailed information of reference stations

图5 CKT0/CKT1(a)台、CKT2台(b)的GPS误差分布<br/>Fig.5 GPS error distribution of CKT0/CKT1(a)and CKT2(b)stations

图5 CKT0/CKT1(a)台、CKT2台(b)的GPS误差分布
Fig.5 GPS error distribution of CKT0/CKT1(a)and CKT2(b)stations

图6 气枪震源每天激发次数统计<br/>Fig.6 Triggering number per day for the airgun seismic source

图6 气枪震源每天激发次数统计
Fig.6 Triggering number per day for the airgun seismic source

图7 2015年53256台垂直分量的功率谱概率密度函数<br/>Fig.7 Probability density function(PDF)for the power characteristics of vertical component recorded at the 53256 station in 2015

图7 2015年53256台垂直分量的功率谱概率密度函数
Fig.7 Probability density function(PDF)for the power characteristics of vertical component recorded at the 53256 station in 2015

图8 2011-01-01—2016-05-19(GMT时间)M≥1.8(a)和M≥4(b)地震分布及其与气枪震源激发时刻的对应分布(c、d)<br/>Fig.8 Distribution of earthquakes with M≥1.8(a)and M≥4(b)and the corresponding distribution with the triggering time of the airgun seismic source from 2011-01-01 to 2016-05-19(GMT time)(c,d)

图8 2011-01-01—2016-05-19(GMT时间)M≥1.8(a)和M≥4(b)地震分布及其与气枪震源激发时刻的对应分布(c、d)
Fig.8 Distribution of earthquakes with M≥1.8(a)and M≥4(b)and the corresponding distribution with the triggering time of the airgun seismic source from 2011-01-01 to 2016-05-19(GMT time)(c,d)