摘要
本文对丽江台水管仪观测资料进行了频谱分析和同震震后效应初步研究。频谱分析结果清楚地显示了日波动和半日波动,并得到了3个主要日潮汐波O1、P1、K1,3个主要半日潮汐波N2、M2、S2和三分之一波M3。该台水管仪记震能力强,同震效应形态均呈振荡型,震后均能恢复到震前日变及趋势变化,震后没有震阶和趋势变化,但可记录到大震后激发的地球自由振荡信息。
We conduct a spectral analysis of the observational data of water tube tihmeter from Lijiang Seismic Station and a study of the coseismic- and postseismic- effect of the Earth＇s tide. We get the day wave, the half-day wave, the daily tidal wave （O1, P1 and K1）, the half-clay tidal wave （N2, M2, S2） and one-third-day tidal wave （M3）. The recorded coseismic tidal wave-forms are oscillating and the tidal wave returns to the normal, pre-earthquake, daily variation and the general trend. Besides, the tidal wave doesn＇t have seismic steps or trend variation but it contains the information of the Earth＇s free oscillation.
出处
《防灾减灾学报》
2010年第1期61-65,共5页
Journal of Disaster Prevention And Reduction
基金
云南省"十项措施"
前兆能力基础建设项目资助
关键词
水管仪
频谱分析
同震效应
震后效应
地球自由振荡
water tube tiltmeter
spectral analysis coseismic effect
postseismic effect
the Earth＇s free oscillation
