Equipment and method for remote monitoring of seismic activity by VLF electromagnetic signals

[摘要] A one-point system equipment and a method used for remote monitoring of seismic activity in the lower ionosphere by electromagnetic signals of lightning discharges with observations in Northern Asia are described. Experimental results of detecting of ionospheric effects of strong earthquakes are considered. The effects of shallow-focus earthquakes with magnitudes larger than 5.0 and their precursors manifest themselves in the amplitude characteristics of atmospherics. It is assumed that the variations in the signal characteristics are related to disturbances in the lower ionosphere. Statistical studies of the detection of ionospheric effects during strong earthquakes are carried out. To increase the accuracy and statistical significance of the results, it is proposed to use a multi-point system. A new software-hardware complex called «Sensor signal analysis network» (SSAN), whose endpoints are located in the territory of Northern Asia for synchronous recording of VLF/LF electromagnetic signals of lightning discharges and VLF-transmitters, is planned to be used to study lithospheric-ionospheric disturbances in the main zones of seismic activity.

[发布机构] Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy of SB RAS, 31, Lenin ave., Yakutsk; 677980, Russia^1;Institute of Cosmophysical Research and Radio Wave Propagation of FEB RAS, Kamchatka Region, Mirnaya str., 7, Elizovskiy district, Paratunka; 684034, Russia^2

[效力级别] 计算机科学

[关键词] Amplitude characteristics;Electromagnetic signals;Ionospheric disturbance;Ionospheric effects;Lightning discharge;Signal characteristic;Statistical significance;Synchronous recordings