DOI: 10.1007/s11069-020-03910-3
论文题名: Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan
作者: Politis D. ; Potirakis S.M. ; Hayakawa M.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 102, 期: 1 起始页码: 47
结束页码: 66
语种: 英语
中文关键词: Criticality
; Earthquakes (EQs)
; Method of critical fluctuations (MCF)
; Seismo-electromagnetics
; Subionospheric VLF propagation
英文关键词: earthquake event
; extreme event
; geomagnetic storm
; ionosphere
; solar activity
; volcanic eruption
; Japan
英文摘要: Ionospheric anomalies possibly related to significant earthquakes (EQs) have been extensively investigated in recent years and could be considered promising for short-term EQ prediction. In this work, we study the subionospheric propagation data recorded during a time period of 3 years (1/1/2014–28/02/2017) by a network of 8 VLF/LF receivers deployed throughout Japan, to identify possible signatures of pre-EQ processes. Specifically, we analyzed the nighttime receiver amplitude data possibly related to any main EQ event with magnitude MW ≥ 5.5 that occurred in a wider area of Japan during the above-mentioned time period (16 main EQ events) by applying the method of critical fluctuations which is able to identify critical dynamics. Our results identified intermittency-induced criticality in the lower ionosphere before all the main seismic events that occurred in Japan during the time period of interest. Criticality was also identified prior to other global or local extreme events such as magnetic storms, solar flares and volcano eruptions, that happened during the analyzed time period, indicating that more research efforts combining the results of more analysis methods, should be devoted in the future in order to discriminate between the subionospheric perturbations related to EQs and the ones related to other extreme geophysical events. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168679
Appears in Collections: 气候变化与战略
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作者单位: Department of Electrical and Electronics Engineering, University of West Attica, Egaleo, 12244, Greece; Hayakawa Institute of Seismo-Electromagnetics Co. Ltd. (Hi-SEM), UEC (University of Electro-Communications), Alliance Center #521, 1-1-1 Kojimacho, Chofu, Tokyo 182-0026, Japan; Advanced Wireless and Communications Research Center (AWCC), UEC, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
Recommended Citation:
Politis D.,Potirakis S.M.,Hayakawa M.. Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan[J]. Natural Hazards,2020-01-01,102(1)