The background noise level of vertical pendulum tiltmeter in China

作者：Ying Zhao

摘要：By using the observation data of the vertical pendulum tiltmeter in China,the influence of different sampling rates on the results of power spectral density is studied,and the background noise level of the seismic frequency band(200-600 s)of different stations and different types of instruments is emphatically analyzed.The conclusions are as follows:1.The results of both single station and national statistics show that the noise levels of the two types of pendulum tiltmeter equal in the seismic frequency band;2.There is no obvious regularity in the regional distribution,due to the influence of ocean and active tectonic movement,the noise levels of some stations in coastal areas are relatively high;3,The curves of high noise level instrument are generally not smooth and burr-prone.Except for some stations affected by the ocean,they are mostly caused by the observation environment or the instrument itself.

发文机构：Key Laboratory of Earthquake Geodesy Wuhan Base of Institute of Crustal Dynamics

关键词：VERTICALPENDULUMTILTMETERPowerSPECTRALDENSITYBACKGROUNDnoise

分类号： P315.6[天文地球—地震学][天文地球—固体地球物理学][天文地球—地球物理学]