Abstract

The passage of the Chelyabinsk meteoroid generated a wide variety of physical effects in all subsystems in the Earth–atmosphere–ionosphere–magnetosphere system. Earlier studies have been conducted in order to examine the Chelyabinsk meteoroid’s effects in the atmosphere, ionosphere, and the geomagnetic field. Particular attention has been given to the features of the infrasound signal generated by the Chelyabinsk meteoroid. At the same time, the results of the statistical analysis of infrasonic parameters are absent in the literature. The purpose of this paper is to construct scatter diagrams for basic infrasonic parameters of the signal propagating globally (such as signal-to-noise ratios, time lags, celerity, time durations, amplitudes, and periods per cycle) depending on either the distance between the infrasound source and the sensor or the source back-azimuth as well as to fit respective regression lines. The data have been retrieved from 15 infrasound stations of the International Monitoring System (IMS) set up by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). On individual occasions, these data have been complemented by the data acquired by the infrasound stations located at the Eurasian geophysical observatories. Scatter diagrams have been constructed for basic parameters of the infrasonic signal propagating globally. The estimated regression lines superimposed on the scatter diagrams of these parameters versus distance or back-azimuth are shown. Estimates of the infrasound signal celerity (approximately 280 m/s) and tropospheric and stratospheric wind speed (approximately 30 m/s) averaged over all propagation paths have been determined. The advantages and disadvantages of the proposed regression lines are discussed.

中文翻译：

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车里雅宾斯克流星体产生的次声参数的统计分析

摘要

车里雅宾斯克流星体的通过在地球-大气-电离层-磁层系统的所有子系统中产生了各种各样的物理效应。为了检查车里雅宾斯克流星体在大气，电离层和地磁场中的作用，已经进行了较早的研究。特别关注车里雅宾斯克流星体产生的次声信号的特征。同时，文献中没有次声参数的统计分析结果。本文的目的是为全球传播的信号的基本次声参数（例如信噪比，时滞，速度，持续时间，幅度，和每个周期的周期）取决于次声源与传感器之间的距离或源的后方位角，以及是否适合各个回归线。该数据是从由全面禁止核试验条约组织（CTBTO）建立的国际监测系统（IMS）的15个次声台站检索得到的。在个别情况下，这些数据已由位于欧亚地球物理观测站的次声台站获得的数据进行了补充。已经为全局传播的次声信号的基本参数构建了散点图。显示了这些参数与距离或后方位角的散点图上叠加的估计回归线。已确定所有传播路径上的次声信号速度（大约280 m / s）以及对流层和平流层风速（大约30 m / s）的平均值。讨论了所提出的回归线的优缺点。