气候变化领域集成服务门户(CCPortal): Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan

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DOI	10.1007/s11069-020-03910-3
	Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan
	Politis D.; Potirakis S.M.; Hayakawa M.
发表日期	2020
ISSN	0921030X
起始页码	47
结束页码	66
卷号	102 期号:1
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.
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
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205880
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
推荐引用方式 GB/T 7714	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],2020,102(1).
APA	Politis D.,Potirakis S.M.,&Hayakawa M..(2020).Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan.Natural Hazards,102(1).
MLA	Politis D.,et al."Criticality analysis of 3-year-long VLF subionospheric propagation data possibly related to significant earthquake events in Japan".Natural Hazards 102.1(2020).