P_(diff)震相在短周期的记录特征

Characteristics of Short Period Recording of P_(diff) Seismic Phase

通过对改则台2014—2017年间极远震记录的分析,简要讨论P_(diff)震相在100~110o范围内深源地震的记录特征。所选取改则台记录的震例M≥6.5,震源深度400km≤h<600km。对比大连台和改则台对P_(diff)震相的记录特征发现,只要满足条件,P_(diff)震相在短周期也有良好的响应,而非通常所认为的P_(diff)震相仅具有长周期特征,这与传统认识有很大的不同,如能进一步分析P_(diff)震相的短周期记录特征,将有助于我们丰富对该震相的产生、传播机制的认识,对以后的地震分析也将起到促进作用。

Based on the change is 2014-2017 teleseismic records analysis,briefly discuss Pdiff seismic phase deep source within 100o to110oseismic record of characteristics.In this paper,the seismic case of the change table recorded is greater than 6.5,and the focal depth of the earthquake is 400km or less than 600km.Compared to dalian station and change the record of Pdiff seismic phase characteristics,found that as long as meet the conditions,Pdiff seismic phase also have good response in short cycle,rather than usually think Pdiff seismic phase only has the characteristics of long period,the traditional understanding is very different,such as further analysis Pdiff short-period record characteristics of seismic phase,rich will help us to produce,the transmission mechanism of the seismic phase,analysis of future earthquakes will also play a role.