دانلود مقاله RADIO-ASTRONOMIC METHOD DOR OUTLINE THE PRECURSORS OF MAJOR AND PERCEPTIBLE EARTHQUAKES
سال انتشار: ۱۳۹۰
محل انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله
تعداد صفحات: ۴
Vardan Adibekyan –
A i m ing at earthquake precursors apportionment the earthquake preparation display of NAKHITCEVAN (Azerbaijan, 02.09.2008, M=5.1), VARDENIS (Armenia, 29.04.2008, M=3.7) BORISAKHO (Georgia, 09.06.2008, M =4.1), earthquakes in time-series have been studied using the geomagnetic and ionospheric tools. Aiming at earthquake forecasting the anomaly in the ionosphere plasma is investigated by a radio-stronomical method. There were received some results, allowing to make out the difference of seismogenic anomalies of ionosphere between the longer anomalies connected to magnetic activity of ionosphere by the method of vertical reconnaissance of ionosphere. Radio astronomical monitoring method makes possible, along with immediate detection of electromagnetic emission from the Earth’s depth in the selected frequency band, to observe other types of lithospheric impact on the atmosphere, such as aerosol, electrostatic, acoustical/gravitational, etc. Those sources ultimately create anomalies at different altitudes of the atmosphere, high affect the propagating radio astronomical signal. Radio astronomical monitoring method has the following clear advantages over the active sensing methods: 1) Cosmic radio sources (Galactic background, discrete radio stars, etc.) are used instead of man-made radiation sources, often powerful, which are able to affect the observed layers of atmosphere; 2) Cosmic radio sources generate noise-like signals, which makes possible observation of the same source at several wavelengths (this is increasingthe informative nests of monitoring); 3) Since the signals from the stellar radio sources pass through all layers of the atmosphere, their informative nests is high; 4) The radio astronomical instruments are highly sensitive and able to detect the smallest changes in the state of the atmosphere.