Two-Mode Ionospheric Disturbances Following the 2005 Northern California Offshore Earthquake From GPS Measurements

doi:10.1029/2017JA025001

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	Two-Mode Ionospheric Disturbances Following the 2005 Northern California Offshore Earthquake From GPS Measurements
	Jin, Shuanggen 1,2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2018-10-01
卷号	123 期号:10 页码:8587-8598
关键词	seismic ionospheric disturbance Rayleigh wave acoustic wave GPS
ISSN号	2169-9380
DOI	10.1029/2017JA025001
英文摘要	Seismo-ionospheric anomalies have been reported, while its disturbance modes, patterns, and mechanism are very complex for different kinds of earthquakes. The earthquake with M-w = 7.2 occurred off the coast of Northern California with strike-slip faulting on 15 June 2005, which may provide a new insight on ionospheric disturbance waves and patterns from dense Global Positioning System (GPS) observations. In this paper, the detailed seismic ionospheric disturbance modes and characteristics are investigated from dense GPS observations following the 2005 Northern California offshore earthquake. Around 10 min after the earthquake, significant ionospheric disturbances are observed by GPS total electron content (TEC). Furthermore, two-mode ionospheric disturbances are clearly found with two speeds, 1.51 and 2.31 km/s. The slow-propagating mode has an amplitude of 0.02-0.04 total electron content unit (TECU), while the fast-propagating mode has an amplitude of 0.1-0.2 TECU. The frequency spectrogram of the slow mode is around 3.7 mHz, while typical frequency of the fast mode is about 5.3 mHz. The fast-propagating mode is close to the speed of the seismic Rayleigh wave, which is the up propagating secondary acoustic wave triggered by the Rayleigh wave. The slow mode ionospheric disturbance is propagating horizontally as the acoustic wave at the ionospheric level, which is caused by the fault rupture in focal regions.
资助项目	Startup Foundation for Introducing Talent of NUIST[2243141801036] ; National Natural Science Foundation of China (NSFC) Project[11573052] ; National Natural Science Foundation of China (NSFC) Project[41761134092]
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000451038700032
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32051]
专题	中国科学院上海天文台
通讯作者	Jin, Shuanggen
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Remote Sensing & Geomat Engn, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Jin, Shuanggen. Two-Mode Ionospheric Disturbances Following the 2005 Northern California Offshore Earthquake From GPS Measurements[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2018,123(10):8587-8598.
APA	Jin, Shuanggen.(2018).Two-Mode Ionospheric Disturbances Following the 2005 Northern California Offshore Earthquake From GPS Measurements.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,123(10),8587-8598.
MLA	Jin, Shuanggen."Two-Mode Ionospheric Disturbances Following the 2005 Northern California Offshore Earthquake From GPS Measurements".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 123.10(2018):8587-8598.