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Geomagnetism and Aeronomy - Abstract—Specific features of the variation in the electron concentration in the ionosphere in front of strong (M ≥ 6) earthquakes in the most seismically... 相似文献
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Pulinets S. A. Khegai V. V. Legen’ka A. D. Korsunova L. P. 《Geomagnetism and Aeronomy》2022,62(3):255-262
Geomagnetism and Aeronomy - A new relative parameter (δBarbier) is proposed for the analysis of ionospheric disturbances and the search for ionospheric precursors of earthquakes. The parameter... 相似文献
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Geomagnetism and Aeronomy - The ionospheric disturbances detected during large earthquake over the region of Haiti on January 12, 2010 on the base the analysis of data GPS-observations are... 相似文献
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Pulinets S. A. Hegai V. V. Legenka A. D. Korsunova L. P. 《Geomagnetism and Aeronomy》2019,59(5):628-637
Geomagnetism and Aeronomy - The paper analyzes the measurement data of the critical frequency (foF2) of the regular ionospheric F2-layer at a number of ground based stations of the vertical... 相似文献
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This paper summarizes the years of studies devoted to the self-similarity of anomalies originating in the ionosphere above the regions of the preparation of strong earthquakes. Using statistical processing of data on electron density variations obtained by methods of vertical sounding and measurements of the total electronic content, we have formed a pattern of similar variations observed at midlatitudes before strong earthquakes; we call it a precursor mask for earthquakes. It was found that the positive anomaly in the ionosphere formed at nighttime after sunset and ended at sunrise. In the case of strong earthquakes, the anomaly can last 12 h and emerge within a few days at the same local time. We propose a physical mechanism of anomaly formation in the ionosphere bound with the diurnal dynamics of the atmospheric boundary layer, which regulates the height distribution of cluster ions. 相似文献
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Geomagnetism and Aeronomy - According to data on earthquakes with a magnitude of М ≥ 4.5 recorded on the planet in 1973–2017, a UT variation in the number of earthquakes with an... 相似文献
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In this paper we analyze the greatest plasma frequency, foF2, named critical frequency, observed by the Chung-Li ionosonde (25.0°N, 121.l°E) during the period of the Chi-Chi (23.87°N, 1 20.75°E) and the Chia-Yi (23.51°E, 120.4°E) earthquakes. The previous 15-day running mean and the associated standard deviation are utilized to construct the upper or lower bound for detecting the seismo-ionospheric perturbations. It is found that the perturbation appeals in 3–4 days prior to the Chi-Chi earthquake as well as 1–3 days prior to the Chia-Yi earthquake. 相似文献
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N. I. Izhovkina I. S. Prutensky S. A. Pulinets N. S. Erokhin L. A. Mikhailovskaya Z. Klos H. Rothkaehl 《Geomagnetism and Aeronomy》2009,49(2):210-218
The measurements of the broadband wave radiation in the topside ionosphere in the region of the geomagnetic equator (the APEX satellite experiment) are presented. The region of unstable plasma with increased density was observed in the nightside topside ionosphere. This region could be formed by heating of the ionosphere from below. An asymmetric distribution of the frequency band width and electrostatic radiation intensity relative to the geomagnetic equator was registered. It has been indicated that a substantial effect of the geomagnetic equator on plasma diffusion from the heating region could be related to the generation, propagation, and damping of electrostatic oscillations and large-scale (as compared to the Larmor ion radius) plasma vortices. The anisotropy in the temperature of the plasma electron component can increase in the regions where the transverse electric field of disturbances damps. The intensity of the electromagnetic radiation, caused by the external sources, apparently, of an artificial origin at frequencies higher than the local plasma frequency, decreases to the radiation detection threshold level in the region of increased plasma density. 相似文献