A statistical study on the correlation between lower ionospheric perturbations as seen by subionospheric VLF/LF propagation and earthquakes

被引：132
|
作者：
Hayakawa, M. [1 ]
Kasahara, Y. [2 ]
Nakamura, T. [2 ]
Muto, F. [2 ]
Horie, T. [2 ]
Maekawa, S. [2 ]
Hobara, Y. [2 ]
Rozhnoi, A. A. [3 ]
Solovieva, M. [3 ]
Molchanov, O. A. [3 ]
机构：
[1] Univ Electrocommun, Res Stn Seismo Electromagnet, Adv Wireless Commun Res Ctr AWCC, Tokyo 1828585, Japan
[2] Univ Electrocommun, Dept Elect Engn, Adv Wireless Commun Res Ctr AWCC, Tokyo 1828585, Japan
[3] Russian Acad Sci, Inst Phys Earth, Moscow 123910, Russia
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2010年 / 115卷
关键词：
ATMOSPHERIC GRAVITY-WAVES; SUMATRA EARTHQUAKE; SEISMIC ACTIVITY; ANOMALIES; PHASE; JAPAN; SIGNALS;
D O I：
10.1029/2009JA015143
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The subionospheric VLF/LF propagation is extensively used to investigate the lower ionospheric perturbation in possible association with earthquakes. An extensive period of data over 7 yr from January 2001 to December 2007 and a combination of different propagation paths in and around Japan are used to examine the statistical correlation between the VLF/LF propagation anomaly (average nighttime amplitude, dispersion, and nighttime fluctuation) and earthquakes with magnitude >6.0. It is then found that the propagation anomaly exceeding the 2s (standard deviation) criterion indicating the presence of ionospheric perturbation is significantly correlated with earthquakes with shallow depth (<40 km). Finally, the mechanism of seismoionospheric perturbations is discussed.
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页数：9
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