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Detection and Evaluation of the Slichter Mode Based on Long-Term Strain Observations
Izvestiya, Atmospheric and Oceanic Physics ( IF 0.7 ) Pub Date : 2021-03-02 , DOI: 10.1134/s0001433820110043
V. K. Milyukov , M. P. Vinogradov , A. P. Mironov , A. V. Myasnikov

Abstract

To search for the Slichter mode (1S1), the longest mode of Earth’s free oscillations, long-term (more than 15 years) strain data of the Baksan laser interferometer–strainmeter (with a measuring-arm length of 75 m) of Sternberg Astronomical Institute, Moscow State University (SAI MSU) (Elbrus region, North Caucasus) are used. The detection and estimation of the Slichter mode is performed according to our developed asymptotically optimal algorithm for data analysis with allowance for the properties of seismic noise and mode features, including the parameters of its splitting. The hypothesis of the constant mode excitation is tested. The most probable periods of the Slichter mode and the values ​​of the splitting parameter are determined, and the statistical reliability of the detection is estimated.



中文翻译:

基于长期应变观测的Slichter模式检测与评估

摘要

搜索Slichter模式(1 S 1),是地球自由振荡的最长模式,莫斯科国立大学Sternberg天文研究所(SAI MSU)的Baksan激光干涉仪–应变仪(测量臂长为75 m)的长期(超过15年)应变数据)(北高加索地区的布鲁斯地区)被使用。Slichter模式的检测和估计是根据我们开发的用于数据分析的渐近最优算法进行的,同时考虑了地震噪声的属性和模式特征,包括其分裂参数。测试了恒模激励的假设。确定Slichter模式的最可能周期和分裂参数的值,并估算检测的统计可靠性。

更新日期:2021-03-02
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