Electric fields that "arrive" before the time derivative of the magnetic field prior to major earthquakes

被引:116
作者
Varotsos, PA [1 ]
Sarlis, NV
Skordas, ES
机构
[1] Univ Athens, Dept Phys, Solid State Sect, Athens 15784, Greece
[2] Univ Athens, Dept Phys, Solid Earth Phys Inst, Athens 15784, Greece
关键词
D O I
10.1103/PhysRevLett.91.148501
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The low frequency electric signals (emitted from the focal area when the stress reaches a critical value) that precede major earthquakes, are recorded at distances approximate to100 km being accompanied by magnetic field variations. The electric field "arrives" 1 to 2 s before the time derivative of the horizontal magnetic field. An explanation, which is still awaiting, should consider, beyond criticality, the large spatial scale as well as that the transmission of the electromagnetic fields (through an inhomogeneous weakly conductive medium like the Earth) obeys diffusion type equations.
引用
收藏
页数:4
相关论文
共 28 条
[1]  
*EPAPS, EPRLTAO91007338 EPAP
[2]   Time-resolved study of charge generation and propagation in igneous rocks [J].
Freund, F .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2000, 105 (B5) :11001-11019
[3]  
GLASGOW S, 2001, PHYS REV E, V64
[4]   Electrodynamics of the phonon-mediated optical Stark effect [J].
Ivanov, AL ;
Nelson, DF .
PHYSICAL REVIEW B, 1998, 58 (03) :1349-1357
[5]  
Lazarus D., 1996, CRITICAL REV VAN EAR, P91
[6]   Propagation of electromagnetic energy and momentum through an absorbing dielectric [J].
Loudon, R ;
Allen, L ;
Nelson, DF .
PHYSICAL REVIEW E, 1997, 55 (01) :1071-1085
[7]   Generalizing the Poynting vector [J].
Nelson, DF .
PHYSICAL REVIEW LETTERS, 1996, 76 (25) :4713-4716
[8]   LAGRANGIAN TREATMENT OF MAGNETIC DIELECTRICS [J].
NELSON, DF ;
CHEN, B .
PHYSICAL REVIEW B, 1994, 50 (02) :1023-1038
[9]   Magnetic field near the outcrop of an almost horizontal conductive sheet [J].
Sarlis, N ;
Varotsos, P .
JOURNAL OF GEODYNAMICS, 2002, 33 (4-5) :463-476
[10]   Numerical model of the selectivity effect and the ΔV/L criterion [J].
Sarlis, N ;
Lazaridou, M ;
Kapiris, P ;
Varotsos, P .
GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (21) :3245-3248