摘要
根据和田台观测日志消除地电场各种明显干扰,利用傅里叶变换计算地电场潮汐谐波振幅,从而得到自然电场、岩石裂隙水主体渗流方向α、极化图像。结果认为,在新疆于田MS6.4地震前和田地电场存在前兆异常变化:地电场谐波振幅突然增大,自然电场水平强度E sp存在快速增大、持续一段时间后下降、然后发震的形态,α存在明显的快速上升再下降,极化图像呈发散-线性集中的过程。
According to the observation log of Hetian station,the obvious disturbance of geoelectric field is eliminated,and the tidal harmonic amplitude of geoelectric field is calculated by Fourier transform,thus the images of natural electric field,seepage directionαand polarization of main body of rock fissure water are obtained.The results show that there are precursory abnormal changes in the electric field before Yutian MS6.4 earthquake and in the field.The harmonic amplitude of the geoelectric field dramatically increases,the horizontal strength of the natural electric field increases rapidly,decreases after a period of time,and then occurs an earthquake.Seepage directionαrapid rise and then decrease,the polarization image shows a process of divergence linear concentration.
作者
邹广
陈亮
牛中华
ZOU Guang;CHEN Liang;NIU Zhonghua(Wenquan station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Wenquan 833400,Xinjiang,China;Hetian station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Hetian 848000,Xinjiang,China)
出处
《内陆地震》
2020年第3期310-316,共7页
Inland Earthquake
基金
新疆地震科学基金(202013).
关键词
新疆于田MS6.4地震
频谱特征
自然电场
Xinjiang Yutian MS6.4 earthquake
Spectrum analysis
Nature geoelectric field
