Observation and analysis of geomagnetic abnormity associated with the Ms=5.7 Jiujiang-Ruichang earthquake
  • 【摘要】

    A three-component geomagnetic survey was carried out during the period from 2002 to 2004 in China including Jiujiang-Ruichang region. Comparing the "2005.0 surface spline model of China geomagnetic fi... 展开>>A three-component geomagnetic survey was carried out during the period from 2002 to 2004 in China including Jiujiang-Ruichang region. Comparing the "2005.0 surface spline model of China geomagnetic field" created on the basis of the survey data with the "1970.0 surface spline model of China geomagnetic field", we can see an obvious abnormity in the geomagnetic horizontal component within a range of about 100 km around the epicenter of the Ms=5.7 Jiujiang-Ruichang earthquake occurred on November 26, 2005. After the earthquake, we carried out a repeated geomagnetic survey at 21 stations in the Jiujiang-Ruichang region and created a corresponding "2005.0 partially revised surface spline model of China geomagnetic field". By comparing the above three models, analyzing the geomagnetic horizontal component at the profile in the Jiujiang-Ruichang region and quantitatively studying the geomagnetic data of every stations around the Ms=5.7 earthquake, we have obtained the geomagnetic abnormity associated with this earthquake. Then the geomagnetic abnormity and its relation with seismic activity are discussed in this paper. 收起<<

  • 【作者】

  • 【作者单位】

    Institute of Geophysics/Earthquake Administration of Anhui Province

  • 【刊期】

    地震学报(英文版) 2006年6期

  • 【关键词】

    geomagnetic survey  surface spline model  geomagnetic anomaly  Ms=5.7 Jiujiang-Ruichang earthquake 

  • 【基金项目】

    Project of China Earthquake Administration during the tenth five-year