热带气旋对海南地震观测井水位及重力测项的影响

摘要

热带气旋“威马逊”和“海鸥”活动期间，在热带气旋低气压和强降雨的特殊自然环境下，海南观测井水位大多呈抖动上升形态，而重力仪观测数据曲线粗糙，噪声变大。通过高通滤波及频谱分析，认为受热带气旋影响，水位变化与低气压相关性较好，热带气旋引起的水位抖动周期为1—10 min；重力观测曲线与热带气旋卓越周期及中心风速等因素有关。%In this article, the observation record characteristics of water level and gravity, during the tropical cyclone “Rammasun” and “Kalmaegi” are summarized and analyzed. The results show that, under the special natural environment such as depression and heavy rainfall, most of the well water level rises. The gravity curve become rough and with larger noise. The correlation of water level changes and the strong rainfall is good through high-pass ifltering. The water level vibration period caused by tropical cyclone is 1—10 min according to spectrum analysis. The gravity observation curve affected by tropical cyclones has a relationship with factors such as predominant period and center wind speed of the tropical cyclone.