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对于震级和烈度的关系,人们通常采用李善邦提出的公式M=0.58I。+1.5以及付承义和刘正荣提出的公式M=0.68I。+1.39logh-1.40。这两个经验关系式在中国地区一般是适合的。可是,在实践中不断发现,对于一次大地震之后的余震包括晚期余震,这个关系又有可以察觉到的系统的差别。本文研究了近十年来中国华北地区几次大地震的余震资料,提出了余震震级与震中烈度之间新的关系式,并给出了初步的理论解释。
For the relationship between magnitude and intensity, people usually adopt the formula M = 0.58I proposed by Li Shanbang. +1.5 and Fu Chengyi and Liu Zhengrong formula M = 0.68I. + 1.39logh-1.40. These two empirical relationships are generally appropriate in China. However, in practice, it has been continuously discovered that there is another systematic difference that can be detected in relation to aftershocks after a major earthquake, including late aftershocks. This paper studies the aftershock data of several large earthquakes in the past ten years in North China, puts forward a new relation between aftershock magnitude and epicenter intensity, and gives a preliminary theoretical explanation.