重力方法在地震预报中的作用
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摘要
利用重力方法研究地球的潮汐和非潮汐变化。通过它们的变化规律了解地下介质的质量变化和密度分布以及地球弹性模量与地震的关系。20多年地震预报实践表明,重力方法在地震预报中有其特殊作用。根据目前在台站或测点按波速异常所圈定的孕震区内发生的地震统计检验:台站监测能力为44％,重力重复测量的监测能力可达56％。
Tide and non-tide variation in earth is studied by using the gravity method. The relation between mass variation and density distribution in underground medium, relation between the earth's elastic modulus and seismicity are explored based on their change low. Earthquake prediction pratice for more than 20 yraes shows that the gravity method has a special significance in earthquake prediction. At present, statistical tests of the occurred earthquakes in seismogenic region encircled based on wave velocity anomalies observed at stations or the observation points have shown that the monitoring ability for the stations is 44% and that for the gravity repetition measurement can reach 56%.
Tide and non-tide variation in earth is studied by using the gravity method. The relation between mass variation and density distribution in underground medium, relation between the earth's elastic modulus and seismicity are explored based on their change low. Earthquake prediction pratice for more than 20 yraes shows that the gravity method has a special significance in earthquake prediction. At present, statistical tests of the occurred earthquakes in seismogenic region encircled based on wave velocity anomalies observed at stations or the observation points have shown that the monitoring ability for the stations is 44% and that for the gravity repetition measurement can reach 56%.
引文
[1] 吴雪芳,唐伯雄,吴兵.利用零漂值和潮汐因子预报地震的可能性.地壳形变与地震,1984,4(4) .
[2] 贾民育,夏岩,张勇军.重力非潮汐变化清理报告.形变、重力、应变专辑.北京:地震出版社,1991．
[3] 冯德益编.地震波速异常.北京:地震出版社,1981．
[4] 吴雪芳.固体潮预报地震的理论基础与方法.地震,1991,(1) .
[2] 贾民育,夏岩,张勇军.重力非潮汐变化清理报告.形变、重力、应变专辑.北京:地震出版社,1991．
[3] 冯德益编.地震波速异常.北京:地震出版社,1981．
[4] 吴雪芳.固体潮预报地震的理论基础与方法.地震,1991,(1) .
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