DIFFERENTIAL CHARACTERISTICS OF PARALLEL OBSERVATION DATA RECORDED BY PENDULUMTYPE TILTMETER AT LINFEN SEISMOSTATION
Gao Zhenqiang 1,2) ;Li Yan 1,2) ;Feng Jianqin 1,2) ;Zhang Yanghui 1,2) ;Jin Hongliang 1,2) ; and Li Jun 1,2)
1)Linfen Central Seismological Station of Earthquake Administration of Shanxi Province, Linfen 0410002)National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan 030025
Abstract：Through the analysis of morphological patterns recorded with three kinds of tiltmeters——quartz pendulum, perpendicular pendulum and broadband perpendicular pendulum before several moderate earthquakes in the south of Shanxi, some anomalous reflects in the same observation direction for each instrument are identified before earthquakes. However, these anomalies did not show coincident variation, but show obvious differential features.Under the same station condition, anomaly difference is related to work periods, dynamical response range and recording frequency range of instrument. The slow earthquake phenomenon recorded by broadband perpendicular pendulum tiltmeter before and after Hejin earthquake illustrates the observation advantage of broadband deformation instruments.
Gao Zhenqiang,Li Yan,Feng Jianqin et al. DIFFERENTIAL CHARACTERISTICS OF PARALLEL OBSERVATION DATA RECORDED BY PENDULUMTYPE TILTMETER AT LINFEN SEISMOSTATION[J]. jgg, 2010, 30(Supp.2): 22-26.
