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一、序言我队从邢台地震后于1967年开始在北京、邢台等地区开展用流动重力复测的方法,来探索地震前后重力场的变化,十多年来积累了大量的、连续的、定期复测第一性资料。尽管使用的仪器为加拿大CG-2型重力仪,与目前国际上高精度的拉科斯特重力仪相比精度低,但在工作过程中和资料分析中,采取了各种措施和改正之后,观测精度已大大高于原仪器的观测精度,尤其在北京测区的复测资料,无论从资料的系统性、观测周期之密、连续时间之长在国内外也是罕见的。利用这些资料,探讨与地震有关的重力变化是本文的目的。
I. Preface Our team explored the changes of gravity field before and after the earthquake by carrying out the re-measurement of flow gravity in Beijing, Xingtai and other regions after the earthquake of Xingtai in 1967. Over the past ten years, the team has accumulated a large number of continuous and regular Retest first-rate information. Although the instrument used is a Canadian CG-2 gravimeter, which has lower precision than the current high-precision Lacoste gravimeter in the world, various measures and corrections have been taken in the course of work and data analysis. Observations The accuracy has been much higher than the original instrument observation accuracy, especially in the Beijing area survey data, no matter from the systematic data, the observation cycle is close, the length of continuous time is rare at home and abroad. It is the purpose of this paper to use these data to investigate the gravity-related changes in earthquakes.