摘要
如何计算地磁场 (或地磁剩余场 )及其长期变化的趋势变化 ,是提取震磁异常的关键。文章简要介绍了计算震磁背景场的数学方法 :多项式方法、球冠谐和分析方法。
It is very important that how to calculate the seismo geomagnetic background field,and study the anomaly variation of geomagnetic field,or geomagnetic residual field and secular variation field.We can use the methods of polynomial(Taylor and Legendre),spherical cap harmonic analysis,rectangular harmonic analysis and surface spline to derive the seismo geomagnetic background field and extract the geomagnetic anomaly variation associated with earthquake.In this paper,above mathematical methods are introduced.
出处
《地震地磁观测与研究》
2000年第5期9-15,共7页
Seismological and Geomagnetic Observation and Research
关键词
震磁背景场
球冠谐和分析
矩谐分析
地磁剩余场
seismo geomagnetic background field,polynomial,spherical cap harmonic analysis, rectangular harmonic analysis,surface spline
