2023年土耳其7.8级强震前烟台台伸缩仪EW分量固体潮畸变

Earth Tide Distortion Recorded by Tensometer at Yantai Station before M7.8 Earthquakes in Türkiye,2023

烟台台SS-Y伸缩仪EW分量在2023-02-06土耳其7.8级双震前2 d开始出现急速上升趋势变化,至6日凌晨开始下降,变化幅度达到9.58×10^(-8),震后维持快速上升趋势。对烟台台伸缩仪稳定性指标进行判定,认为仪器稳定;经现场核实,未发现环境干扰。最后对烟台台伸缩仪固体潮畸变特征进行分析,并基于畸变与远震前兆的关系进行初步探讨。

The EW component of SS-Y tensometer at Yantai station began to show a rapid upward trend 2 days before the 2023-02-06 Türkiye M7.8 double earthquakes,and began to turn downward in the early morning of 2023-02-06,with a range of 9.58×10^(-8),and maintained a rapid upward trend after the earthquakes.The stability index of Yantai tensometer is judged and it is considered that the instrument is stable.After on-site verification,no environmental interference was found.Finally,the characteristics of the earth tide distortion are analyzed,and the relationship between the distortion and the distant earthquake precursor is discussed.