Sharma, Sarita, Singh, Raj Pal. (1400). On the Propagation of VLF Electric Field Emissions Associated with Earthquakes in the Middle Layer of the Earth Crust. , 47(4), 1-13. doi: 10.22059/jesphys.2021.298662.1007196
Sarita Sharma; Raj Pal Singh. "On the Propagation of VLF Electric Field Emissions Associated with Earthquakes in the Middle Layer of the Earth Crust". , 47, 4, 1400, 1-13. doi: 10.22059/jesphys.2021.298662.1007196
Sharma, Sarita, Singh, Raj Pal. (1400). 'On the Propagation of VLF Electric Field Emissions Associated with Earthquakes in the Middle Layer of the Earth Crust', , 47(4), pp. 1-13. doi: 10.22059/jesphys.2021.298662.1007196
Sharma, Sarita, Singh, Raj Pal. On the Propagation of VLF Electric Field Emissions Associated with Earthquakes in the Middle Layer of the Earth Crust. , 1400; 47(4): 1-13. doi: 10.22059/jesphys.2021.298662.1007196

On the Propagation of VLF Electric Field Emissions Associated with Earthquakes in the Middle Layer of the Earth Crust

فیزیک زمین و فضا
مقاله 1، دوره 47، شماره 4، زمستان 1400، صفحه 1-13    اصل مقاله (2.27 M)
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22059/jesphys.2021.298662.1007196
نویسندگان
Sarita Sharma1؛ Raj Pal Singh* 2
1Research Scholar, Department of Physics, Institute of Applied Sciences & Humanities, GLA University, Mathura, India
2Professor, Department of Physics, Institute of Applied Sciences & Humanities, GLA University, Mathura, India
چکیده
An ensemble of elementary radiators is generated on the basement rock because of the applied stresses in the preparation zone of the earthquakes in the earth crust. Considering such an ‘ensemble’ as the source of electromagnetic signals, the strength of the electric field is estimated at different distances and frequencies laying in range (3 – 27 kHz) at three different conductivities of the crustal layers (10-8, 10-9, 10-10 S/m). The results of the computation are presented in this paper. Moreover, propagation distances for the seismogenic VLF emissions have also been calculated in the frequency band (3 – 27 kHz) at the conductivities laying in the range (10-8 - 10-10 S/m) within the limit of detectability of measuring instruments (10-7 V/m). It is observed that these distances increase with the decrease of conductivity of the middle layer of crust. Furthermore, theoretical results of computations are verified from the experimental observations of the seismic event that occurred at the distance of 698 km from the observing station at Chaumuhan Mathura (Geographic lat. 27.490N, long. 77.670E). In addition to this, the generation and propagation mechanisms of seismo-electromagnetic radiations have also been discussed briefly.
کلیدواژه‌ها
Attenuation؛ Earthquake؛ Earth crust؛ Radiating dipole؛ VLF waves
مراجع
آمار
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