Title :
ULF emission induced by tension and shear cracks
Author :
Kulchitsky, Anton V. ; Molchanov, Oleg A. ; Hayakawa, Masashi
Author_Institution :
Univ. of Electro-Commun., Tokyo, Japan
Abstract :
Penetration of low-frequency waves through a conductive medium due to the inductive seismo-electromagnetic effect is considered by a double-potential method. The source of electromagnetic waves induced by the movement of a conductive medium in a geomagnetic field is produced by tension and shear cracks. The analytical solution for tension cracks is obtained. The system of equations describing this process in the case of shear cracks in spherical coordinates is reduced to a two dimensional nonstationary system, which is solved by a second order algorithm that conserves some integral properties of the initial equations. Results are discussed.
Keywords :
cracks; earthquakes; radiowave propagation; rocks; terrestrial electricity; 0.003 to 10 Hz; ULF electromagnetic emissions; conductive medium; double-potential method; electromagnetic waves; geomagnetic field; inductive seismo-electromagnetic effect; low-frequency waves; second order algorithm; shear cracks; tension cracks; two dimensional nonstationary system; Earthquakes; Electromagnetic fields; Frequency; Geomagnetism; Integral equations; Magnetic analysis; Magnetic domains; Magnetic fields; Physics; Seismic waves;
Conference_Titel :
Electromagnetic Compatibility, 2002 3rd International Symposium on
Print_ISBN :
0-7803-7277-8
DOI :
10.1109/ELMAGC.2002.1177347
