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重力重复测量的原始结果中,包含有各种干扰因素的影响。如何从测量数据中排除干扰,提取与地震有关的可靠信息,是当前重力重复测量研究工作中的一个重要内容。 我们对1970年至1979年京、津、唐、张地区重力重复测量资料作了较系统的统计分析,在比较各种统计分析的结果后,发现用逐步迴归法处理资料,对于寻找产生干扰的原因较有效。统计分析结果证明,在唐山主震前,重力值有趋势性变化和中短期变化。
The original results of gravity-repeated measurements include the effects of various disturbing factors. How to eliminate the interference from the measured data and extract the reliable information related to the earthquake is an important part of the current research work of gravity measurement. We made a systematic statistical analysis of the data of gravity measurements in Beijing, Tianjin, Tang and Zhang from 1970 to 1979. After comparing the results of various statistical analyzes, we found that the data were processed by stepwise regression, The reason is more effective. Statistical analysis results show that before the main Tangshan earthquake, gravity values have the trend of change and short-term changes.