Planetary statistics of the critical frequency of the ionospheric F2 region during catastrophic earthquakes

被引：0

作者：

A. L. Dzvonkovskaya

V. A. Kuznetsov

N. P. Sergeenko

机构：

[1] JSC SPC ScientificResearch Institute of Longe-Range Communications,Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation

[2] Institute of Applied Geophysics,undefined

[3] Russian Academy of Sciences,undefined

来源：

Geomagnetism and Aeronomy | 2006年 / 46卷

关键词：

94.20.Ji; 91.30.Px;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The statistics of the relative variations (δfoF2) in the critical frequency of the ionospheric F2 region during catastrophic earthquakes with magnitude M ≥ 6 at 70 vertical sounding (VS) automatic ionospheric stations (AISs) of the global network is considered. Five-day periods including 70 such situations have been selected for 1981 and 1983–1985. Five sets of 24 foF2 measurements from 3 days before to a day after the earthquake instant are formed for each AIS. The number of AISs, for which the fourth statistical invariant is above the significance level (E ≥ 1), has been analyzed. It has been indicated that the histogram deformation at the set of AISs is substantial a day before earthquakes.

引用

页码：522 / 523

页数：1

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