大同站FHD-2B地磁观测数据典型干扰分析

郝雪景; 韩胜; 高龙飞; 刘炜

doi:10.19987/j.dzkxjz.2022-157

大同站FHD-2B地磁观测数据典型干扰分析

doi: 10.19987/j.dzkxjz.2022-157

郝雪景^{1, 2, ,},
韩胜^{1, 2},
高龙飞^{1, 2},
刘炜^{1, 2}

1.
山西省地震局大同地震监测中心站, 山西大同 037000
2.
太原大陆裂谷动力学国家野外科学观测研究站, 山西太原 030025

基金项目: 山西省地震局科研项目（SBK-2009）和中国地震局地质研究所国家野外科学观测研究站课题（NORSTY20-05）联合资助。

详细信息

通讯作者:
郝雪景（1994-），女，助理工程师，从事地震监测工作。E-mail：461691938@qq.com

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- 文章访问数: 38
- HTML全文浏览量: 26
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出版历程
- 收稿日期: 2022-10-20
- 录用日期: 2022-11-30
- 网络出版日期: 2023-01-18

Typical interference analysis of FHD-2B observation data at Datong seismic station

Hao Xuejing^{1, 2
, ,},
Han Sheng^{1, 2},
Gao Longfei^{1, 2},
Liu Wei^{1, 2}

1.
Datong Seismic Station of Shanxi Earthquake Agency, Shanxi Datong 037000, China
2.
National Continental Rift Valley Dynamics Observatory of Taiyuan, Shanxi Taiyuan 030025, China

摘要

摘要: 山西省大同地震监测中心站FHD-2B地磁观测数据质量主要受仪器自身观测系统和周围环境干扰影响，由于仪器出厂后性能接近稳定，因此要提高观测数据质量，可以从改善环境干扰入手。本文从连续率、完整率和背景噪声三个方面对2017年至2021年的观测数据进行质量评价，发现自2019年6月仪器更新改造后，仪器背景噪声水平明显降低。通过分析场地施工、车辆运行、高压直流输电、断电等典型干扰事件下的数据曲线形态，发现施工干扰一般表现为各分量受干扰时段一致，干扰幅度不同；高压直流输电干扰常表现为Z分量干扰严重，可以通过国家地磁台网中心给出的干扰时段，结合周边地磁台站数据进行处理；车辆干扰对数据各分量均产生干扰，对应于车辆活动时段；断电干扰表现为D、H、Z分量观测数据曲线变粗，毛刺增多，甚至出现错误数据，通过修改仪器参数解决。总结不同干扰曲线特征，便于工作人员正确使用FHD-2B地磁数据，进行地震研究。
- FHD-2B /
- 地磁 /
- 质量评价 /
- 干扰 /
- 大同
Abstract: The geomagnetic observation data of FHD-2B at Datong seismic station in Shanxi is mainly affected by the interference of the instrument's own observation system and the surrounding environment. Since the performance of the instrument is nearly stable after delivery, we can improve the quality of observation data by improving the environment. In this paper, the quality of observation data from 2017 to 2021 is evaluated from three aspects: continuity rate, integrity rate and background noise, and it is found that the background noise level of the instrument has been significantly reduced since the instrument was updated in June 2019. By analyzing the data curves of different interferences such as construction interference, vehicle interference, high-voltage direct current transmission interference and power failure, it is found that the construction interference is generally manifested in the same period of time when each component is interfered, and the interference amplitude is different; The interference of high-voltage direct current transmission is usually serious in Z component, which can be processed through the interference period given by the National Geomagnetic Network Center and combined with the data of surrounding geomagnetic stations; Vehicle interference interferes with each component of data, corresponding to vehicle activity period; The power failure interference shows that the observed data curves of D, H and Z components become thicker, burrs increase, and even wrong data appear, which can be solved by modifying the parameters of the instrument home page. The characteristics of different interference curves are summarized, which is convenient for workers to use FHD-2B geomagnetic data correctly for seismic research.
- FHD-2B /
- geomagnetism /
- quality evaluation /
- interference /
- Datong

HTML全文

图 1 大同站地理位置图

Figure 1. Location Map of Datong Station

下载: 全尺寸图片幻灯片

图 2 FHD-2B磁力仪结构图

Figure 2. The structure diagram of FHD-2B

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图 3 大同站与台网背景噪声值对比

Figure 3. The comparison of background noise between Datong station and Network center

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图 4 大同站FHD仪2019年12月10日施工干扰数据曲线

Figure 4. The construction interference to FHD on December 10, 2019

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图 5 山西省受高压直流输电干扰线路图

Figure 5. Line diagram of Shanxi Province interfered by HVDC transmission

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图 6 2019年4月28日大同站、太原站FHD仪受晋南线输电干扰曲线

Figure 6. Jinnan transmission interference to FHD on April 28, 2019

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图 7 太原站、代县站、定襄站和大同站干扰幅度拟合曲线

Figure 7. Fitting curve of interference amplitude of Taiyuan, Daixian, Dingxiang and Datong

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图 8 2020年9月20日大同站FHD仪受车辆干扰曲线

Figure 8. Vehicle interference to FHD on September 20, 2020

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图 9 2020年10月13日—14日大同站FHD仪断电干扰曲线

Figure 9. Power off interference to FHD from October 13 to 14, 2020

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图 10 大同站FHD仪仪器参数界面

Figure 10. Instrument Parameter Interface of FHD in Datong Station

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表 1 2017年—2021年大同站FHD仪数据连续率、完整率

Table 1. The continuity rate and integrity rate of FHD data from 2017 to 2021

年份	连续率（%）				完整率（%）
年份	H	D	F	H	D	F
2017年	99.94	99.94	99.94		99.52	99.41	99.68
2018年	99.73	99.73	99.73		99.67	99.66	99.67
2019年	98.44	98.44	98.44		98.25	98.25	98.24
2020年	99.79	99.79	99.79		99.26	99.26	99.61
2021年	99.99	99.99	99.99		99.99	99.99	99.99

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表 2 2018—2020年晋南线干扰统计表

Table 2. Statistics of interference of Jinnan transmission from 2018 to 2020

干扰时段	大同	太原		代县		定襄
干扰时段	幅度（nT）	幅度（nT）	比值	幅度（nT）	比值	幅度（nT）	比值
2018/2/21 16:13-16:18	−0.7	1.6	−2.286	−17.4	24.857	9	−12.857
2018/2/21 16:19-16:21	0.7	−1.6	−2.286	17.4	24.857	−9	−12.857
2018/6/9 12:10-12:12	−0.5	1.2	−2.400	−13.1	26.200	6.8	−13.600
2018/6/9 12:31-12:33	0.5	−1.2	−2.400	13.1	26.200	−6.8	−13.600
2018/6/15 7:29-07:31	−1.8	4	−2.222	−43.4	24.111	22.5	−12.500
2018/6/15 11:26-11:29	1.8	−4	−2.222	43.4	24.111	−22.5	−12.500
2019/3/25 16:34-16:36	−2.1	4.7	−2.238	−51.3	24.429	26.6	−12.667
2019/3/25 19:02-19:05	2.1	−4.7	−2.238	51.3	24.429	−26.6	−12.667
2019/4/28 17:43-17:54	−2.1	4.8	−2.286	−52.3	24.905	27.2	−12.952
2019/4/28 20:32-20:35	2.1	−4.8	−2.286	52.4	24.952	−27.2	−12.952
2019/5/22 17:53-18:08	2.1	−4.8	−2.286	52.1	24.810	−27.1	−12.905
2019/5/22 18:45-18:48	−2.1	4.8	−2.286	−52.2	24.857	27.1	−12.905
2019/5/29 17:26-17:29	2.1	−4.8	−2.286	52.1	24.810	−27.1	−12.905
2019/5/29 19:40-19:43	−2.1	4.8	−2.286	−52.2	24.857	27.1	−12.905
2019/5/29 20:43-20:57	−1.4	3.2	−2.286	−34.8	24.857	18.1	−12.929
2019/5/29 20:57-20:59	−0.7	1.6	−2.286	−17	24.286	8.8	−12.571
2019/5/29 21:18-21:20	2.1	−4.8	−2.286	51.8	24.667	−26.9	−12.810
2020/3/9 6:26-6:36	2.1	−4.7	−2.238	50.7	24.143	−26.3	−12.524
2020/3/9 8:21-8:24	−2.1	4.7	−2.238	−50.7	24.143	26.3	−12.524
2020/5/23 11:54-11:59	−1.4	3.1	−2.214	−33.8	24.143	17.5	−12.500
2020/5/23 12:44-12:46	1.4	−3.1	−2.214	33.8	24.143	−17.5	−12.500
2020/6/9 14:51-14:58	2.1	−4.8	−2.286	51.9	24.714	−26.9	−12.810
2020/6/9 14:59-15:01	−2.1	4.8	−2.286	−51.9	24.714	26.9	−12.810
2020/6/9 15:01-15:06	−2.1	4.8	−2.286	−52.3	24.905	27.1	−12.905
2020/6/9 15:07-15:09	2.1	−4.8	−2.286	52.3	24.905	−27.1	−12.905

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