1303年山西洪洞8级大地震的时间有序性特征  

Characteristics on Time Order of the 1303 Hongtong ,Shanxi, Strong Earthquake of M 8

作　　者：徐道一[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《山西地震》2003年第3期34-36,共3页Earthquake Research in Shanxi

基　　金：十五"科技攻关"强地震短期预测与救灾技术研究"(01-05-07)。

摘　　要：1303年山西洪洞地震是我国历史记录中被确认的第一个8级大地震。引入有序系列和有序组合的含义,对1303年山西洪洞地震和1556年陕西华县地震分别形成的2个有序系列进行了研究,认为2个8级地震的发震时间有一个时间差(τ)。2个τ值之差用Δτ来表示。若2个τ值相差不大,则4个地震(有时可以是3个地震)组成一个有序组合。2个有序系列可有7个有序组合。7个有序组合的τ值在100a～450a范围变化,但它们的Δτ值仅在10d～2400d范围内变化,表示了2个有序序列之间的密切联系。震例表明,1303年洪洞大地震与其他8级地震之间的间隔的形成机制可能与沙罗周期有关。1303 Hongtong ,Shanxi, earthquake is the first one which was confirmed as a earthquake of M 8 in China's history. In this paper, the concepts of order sequence and order combination are defined. A study on 2 order sequences formed by the strong 1303 Hongtong ,Shanxi, earthquake and strong 1556 Huaxian ,Shaanxi, earthquake is made. There is a time interval (τ) between the origin times of these 2 earthquakes of M 8. The interval between 2 τ values is expressed by Δτ. If Δτ is small, an order sequence is composed of 4 events (sometimes 3 events).2 order sequences may be made into 7 combinations. The changing range of these 7 combinations is from 100 to 450 years, meanwhile Δτ is from 10 to 2 400 days showing the close relation between these 2 order sequences.The earthquake examples show that the forming mechanism of interval between 1303 Hongtong ,Shanxi, earthquake and other earthquakes of M 8 may be related to Shallo period.

关 键 词：山西 地震复发间隔 时间有序性 沙罗周期 洪洞地震 

分 类 号：P316[天文地球—地震学] P315.75[天文地球—固体地球物理学]