ANALYSIS OF DATA VARIATION OF SSQ-2 DIGITAL HORIZONTAL PENDULUM AT TAIAN STATION
Lu Shuangling 1) ; Yu Qingmin 1) ;Zhong Puyu 2) ;Lü Chunshuai 2) ;Lin Xiuna 1) ; and Li Feng 1)
1)Taian Fiducial Seismostation of Earthquake Administration of Shandong Province,Taian 2710002)Earthquake Administration of Shandong Province,Jinan 250014
Abstract：The observations of digital horizontal pendulum of Taian seismostation for 10 years was systematically summarized. After excluding disturbance the typical variation of recorded data is classified and analysed. Basically, there are four types of variation as follows: 1) wide shift, trend change;2)earth tide distortion of single day;3) multiday earth tide distortion accompanied with frequent zerodrift;4) frequent zerodrift without obvious variation of earth tide. Trend change and earth tide alteration dominate the NS component distortion while frequent zerodrift reigns the EW component. The relation between distortion and earthquakes is that: The preearthquake distortions appear as earthquakes of magnitude lager than 7.0 with epicenter distance 2 000-5 000 km. The preearthquake distortions accompany with some earthquakes father than 5 000 km.
Lu Shuangling ,Yu Qingmin ,Zhong Puyu et al. ANALYSIS OF DATA VARIATION OF SSQ-2 DIGITAL HORIZONTAL PENDULUM AT TAIAN STATION[J]. jgg, 2010, 30(Supp.1): 53-61.
