中国首都地区场震磁监测实验区观测与研究

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Journal of Volcanology and Seismology Pub Date : 2023-08-22 DOI:10.1134/S0742046323700203
Shupeng Su, Shuanggui Chen, Huiqin Zhao
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引用次数: 0

摘要

为探索利用磁场测量技术提炼震磁信息的有效途径,介绍了中国首都地区的震磁监测系统。它包括现场测量技术、数据处理方法和应用性能。利用X、Y、Z分量的地磁数据产品,系统计算和统计分析了本区的地壳磁场变化特征和震磁信息。结果表明,研究区地壳磁场X、Y、Z的平均振幅分别为1.87、1.90、1.39 nT,均方差分别为2.41、2.48、1.94 nT。未来大地震的震中多位于地壳磁场变化“0”值线附近,振幅极低,其中X、Y、Z元素分别为测区平均值的18.7%、45.5%和53.9%,震后明显上升。震中位置与地磁场长期变化空间变化率较低的异常区域有较高的相关性。
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Observation and Research of Field Seismomagnetic Monitoring Experimental Areas in the Capital Region of China

To explore an efficient approach refining seismomagnetic information through magnetic field survey technology, the author introduces the seismomagnetic monitoring system of the capital region in China. It includes field measurement techniques, data processing methods and application performance. The variation characteristics of the crustal magnetic field and seismomagnetic information in this area are systematically calculated and statistically analyzed based on the geomagnetic data products of the X, Y, and Z components. The results show that the mean amplitudes of X, Y and Z of the crustal magnetic field in the study area are 1.87, 1.90, and 1.39 nT, and the mean square deviations are 2.41, 2.48, and 1.94 nT, respectively. The epicenters of future large earthquakes will mostly lie near the “0” value line of crustal magnetic field variation with very low amplitude, which X, Y and Z elements are 18.7, 45.5 and 53.9% of the mean values in the survey area, respectively, and rise obviously after the earthquake. There is a high correlation between the location of the epicenter and the anomalous region of low spatial variation ratio of geomagnetic field secular variation.

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来源期刊
Journal of Volcanology and Seismology
Journal of Volcanology and Seismology 地学-地球化学与地球物理
CiteScore
1.50
自引率
28.60%
发文量
27
审稿时长
>12 weeks
期刊介绍: Journal of Volcanology and Seismology publishes theoretical and experimental studies, communications, and reports on volcanic, seismic, geodynamic, and magmatic processes occurring in the areas of island arcs and other active regions of the Earth. In particular, the journal looks at present-day land and submarine volcanic activity; Neogene–Quaternary volcanism; mechanisms of plutonic activity; the geochemistry of volcanic and postvolcanic processes; geothermal systems in volcanic regions; and seismological monitoring. In addition, the journal surveys earthquakes, volcanic eruptions, and techniques for predicting them.
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