Analysis on the perfect and application of basic information of seismic stations
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摘要: 地震台站作为地震系统基础单元，是设置地震监测设施并开展地震监测的基层机构，完备的地震监测设施和良好的地震观测环境是地震观测的基础。掌握完整、准确的地震台站基础信息是做好地震台站管理的关键。由于观测手段更新、观测环境变迁和建设条件差异的原因，投入运行后的地震台站基础信息与规划设计有偏差，一定程度上影响地震观测数据的准确性和有效性。本文论述了地震台站基础信息完善的意义，通过实例说明准确、有效的地震台站基础信息，在地震观测干扰排查、观测环境保护和台站升级改造方面的应用，旨在引起行业重视地震台站基础信息的收集、管理和应用，进而确保地震观测数据科学有效。Abstract: As the basic unit of seismic system, seismic station is the basic organization to set up earthquake monitoring facilities and carry out earthquake monitoring. Complete earthquake monitoring facilities and good earthquake observation environment are the basis of earthquake observation. Mastering the complete and accurate basic information is good for management. For the update of observation equipment, the change of observation environment and the difference of construction conditions, the basic information of seismic stations is different from the initial state. It has an impact on the accuracy and effectiveness of seismic data. This paper discusses the significance of improving the basic information of seismic stations, the application of basic information in observation interference investigation, observation environment protection, and upgrading of seismic stations. It aims to draw the industry’s attention to the collection, management, and application of basic information of seismic stations, so as to ensure the scientific and effective seismic observation data.
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图 5 2020年11月14日地电场观测干扰曲线
Figure 5. Interference curve of geoelectric field observation on November 14，2020
图 6 干扰源参考计算模型及地图投影
Figure 6. Reference calculation model of interference source and map projection
图 7 不同干扰源避让范围示意图
Figure 7. Schematic diagram of avoidance range of different interference source
表 1 干扰变化幅度及方位角统计
Table 1. Interference amplitude and azimuth statistics
干扰事件 长极距 方位角 短极距 方位角 NS EW NW NS EW NW 第1组 −5.60 −5.06 −0.38 42 −7.82 −6.85 −0.69 41 第2组 −5.15 −5.88 0.49 49 −7.12 −7.83 0.51 48 第3组 −5.50 −4.72 −0.55 41 −7.66 −6.46 −0.85 41 注：干扰幅度单位为（mV/km），方位角单位为（°），计算时四舍五入取整 
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