延寿地震台钻孔倾斜干扰因素分析

Analysis of Interference Factors of Borehole Inclinometer in Yanshou Seismic Station

摘要: 延寿地震台钻孔倾斜自正式观测以来运行良好，取得了连续完整且高质量的数据资料。通过对延寿钻孔倾斜的运行状态进行评价，并结合以往的研究结果，归纳总结出可对延寿地震台竖直摆倾斜观测造成干扰的主要因素为仪器零漂干扰、电压突变干扰、同震干扰、气压干扰、降水干扰和水库库容变化干扰等。通过对2005~2015年期间延寿钻孔倾斜及相关资料进行数据分析，结果表明影响仪器曲线形态和观测质量的主要因素为仪器零漂，水库库容变化、短期内降雨对钻孔倾斜观测影响不大。

Abstract: The borehole inclinometer in Yanshou has been running well since its official observation, and obtained continuous, complete and high-quality data. The operating status of the Yanshou drilling tilt was evaluated. Based on past experience, the main factors of disturbing the borehole inclinometer in Yanshou County seismic station are instrument drift, voltage sudden change, simultaneous-earthquake, atmospheric pressure, rainfall, capacity change of reservoir etc., through analyzing related data during the period of 2005-2015. The results show that the main factors affecting the instrument’s curve shape and observation quality are zero drift of the instrument, and the change of reservoir capacity and short-term rainfall have little effect on borehole tilt observation.