P_(diff)震相在短周期的记录特征
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摘要
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 P_(diff) seismic phase deep source within 100 o to110 oseismic 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 400 km or less than 600 km.Compared to dalian station and change the record of P_(diff) seismic phase characteristics, found that as long as meet the conditions, P_(diff) seismic phase also have good response in short cycle, rather than usually think P_(diff) seismic phase only has the characteristics of long period, the traditional understanding is very different, such as further analysis P_(diff) 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.
Based on the change is 2014-2017 teleseismic records analysis, briefly discuss P_(diff) seismic phase deep source within 100 o to110 oseismic 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 400 km or less than 600 km.Compared to dalian station and change the record of P_(diff) seismic phase characteristics, found that as long as meet the conditions, P_(diff) seismic phase also have good response in short cycle, rather than usually think P_(diff) seismic phase only has the characteristics of long period, the traditional understanding is very different, such as further analysis P_(diff) 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.
引文
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[2]秦四清,薛雷,李培,等.国外某些地震区大地震孕育过程分析(Ⅰ)[J].地球物理学进展,2014,(04):1541-1554.
[3]许玉红,陈建军,李兴坚,等.Pdiff震相在嘉峪关地震台的记录特征分析[J].震灾防御技术,2014,9(S1):632-638.
[4]秦昌,徐略勤,刘津成,等.高墩大跨连续刚构桥长周期地震响应对比研究[J/OL].中外公路,2017,37(01):72-78.
[5]周鹏程,雷军.太平洋大型横波低速带东部边界地幔最下部各向异性研究[J].地震学报,2016,38(01):1-14+157.
[6]瓦伦苏埃拉.墨西哥的地震观测[J].国际地震动态,1999,(11):17-21.
[7]汤倩.地震速报的中源地震快速确认的基本方法[J].甘肃科技,2016,32(13):45-50+8.
[8]李子丰.对地震震源深度600多公里的质疑[J/OL].中国科技信息,2017,(09):66.
[9]竹内敬二,赵仕万.墨西哥地震的长周期波[J].国际地震动态,1986,(12):27-29.
[10]方小丹,魏琏,周靖.长周期结构地震反应的特点与反应谱[J].建筑结构学报,2014,35(03):16-23.