云南及邻区Ms≥6．0级地震的重力异常指标体系研究
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摘要
本文对云南省昆明台和弥渡台多年的重力观测资料进行了潮汐变化和非潮汐变化的系统研究，总结了异常特征，给出了云南及邻区的Ｍｓ≥６．０级地震重力异常指标体系和震级与重力异常幅度、时间及震中距的统计公式。结果表明，潮汐变化中的重力潮汐因子变化对地震的反映较好，其对应率较高。
Systematic studies have been made on tidal and non-tidal variations of gravity data observed for many years in Kunming and Midu stations.Summarizing anomalous features, some gravity anomaly criteria system and statistic formula among magnitude, anomalous amplitude, time and epicentral distance before earthquake of M≥6 have been presented in Yunnan and its adjacent areas. The results show that gravity tide factor in tidal variation has better reflection to earthquakes, and with good correspondent ratio.
Systematic studies have been made on tidal and non-tidal variations of gravity data observed for many years in Kunming and Midu stations.Summarizing anomalous features, some gravity anomaly criteria system and statistic formula among magnitude, anomalous amplitude, time and epicentral distance before earthquake of M≥6 have been presented in Yunnan and its adjacent areas. The results show that gravity tide factor in tidal variation has better reflection to earthquakes, and with good correspondent ratio.
引文
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