赤城台水位检测基频球型自由振荡的再认识  

RECOGNITION OF THE FOUNDATIONAL-FREQUENCY SPHEROIDAL FREE OSCILLATIONS DETECTED BY CHICHENG SEISMIC STATION WATER LEVEL

作　　者：符泽宇 任佳[1] 赵建明[1] 李金[1] 王妍[1] 

机构地区：[1]河北省地震局唐山中心台,河北唐山063000

出　　处：《防灾减灾学报》2016年第3期105-108,共4页Journal of Disaster Prevention And Reduction

摘　　要：针对印尼9．0级大地震，我们在既保证低频自由振荡信号的分辨率，又不对高频自由振荡信号产生抑制效应的前提下，采取逐步增减样本数据的方法进行试验，首次用赤城台的水位观测资料较好地检测到了0S2～0S76的基型球型振荡，并与地球初步参考模型（PREM）的理论自由振荡频率进行了对比，发现实测振荡频率与PREM预测的振荡频率基本符合。In view of the 9.0 magnitude earthquake in Indonesia, this study conducted an experiment by adopting the method of gradually increasing or decreasing sample data under the premise of ensuring the resolution ratio of low frequency free oscillation signals and no inhibiting effect on high frequency free oscillation signals. For the first time, it fairly detected the foundational frequency spheroidal free oscillations of 0S2-0S76 with the water level observation data of Chicheng Seismic Station and the comparison with the free oscillation frequency of Preliminary Reference Earth Model （ PREM ） theory found that the measured oscillation frequency basically corresponds with the predicted oscillation frequency of PREM.

关 键 词：赤城台 水位资料 地球自由振荡 印尼9.0级地震 

分 类 号：P315.72[天文地球—地震学]