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Two-Azimuth Co-Seismic Ionospheric Disturbances Following the 2020 Jamaica Earthquake From GPS Observations
Chai, Yi1,2; Jin, Shuanggen1
2021-09-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume126Issue:9Pages:13
AbstractCo-seismic ionospheric disturbance (CID) may provide insights on understanding the coupled nature of earthquake-atmosphere geophysical processes. In this study, the CIDs following the M-w 7.7 Jamaica earthquake on January 28, 2020 are detected about 12 min after the main shock by the dual-frequency Global Positioning System measurements. Significant CIDs at two azimuths are observed from satellite PRN03, 04 and 26 with spreading out at 3.54, 3.51 and 3.48 km/s respectively, which are close to the spreading speeds of Rayleigh waves recorded by the seismographs. The significant CID signals are found in south near-field area and southwest far-field area. Furthermore, CID characteristics are analyzed in terms of amplitude, elevation and azimuth angle, waveform, and frequency domain. Results show that CIDs are observed by PRN03, 04 and 26 at low elevation angles (<35 degrees) in infrasonic wave frequency domain and the average negative amplitudes of CIDs observed by PRN26 are larger than -0.08 TECU, while the CID amplitudes observed by PRN03 and PRN04 are about -0.05 and -0.07 TECU, respectively. Moreover, the azimuthal asymmetry of CID amplitude in SW and SE azimuths and different initial polarities in disturbance signals are found and discussed from tectonic and nontectonic factors. The relations among CID, Rayleigh wave and focal mechanism are interpreted. The upward propagating secondary acoustic wave triggered by the seismic Rayleigh wave from earthquake is the main source of CIDs. These results confirm that strike-slip earthquake can also generate pronounced co-seismic ionospheric disturbances.
Keywordco-seismic ionospheric disturbance (CID) GPS Rayleigh wave strike-slip earthquake
Funding OrganizationNational Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project
DOI10.1029/2020JA028995
WOS KeywordELECTRON-CONTENT OBSERVATION ; 2008 WENCHUAN EARTHQUAKE ; PACIFIC COAST ; TEC RESPONSE ; WAVES ; TIME
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC) Project[12073012] ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project[41761134092]
Funding OrganizationNational Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China (NSFC) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project ; National Natural Science Foundation of China-German Science Foundation (NSFC-DFG) Project
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000702340700051
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75055
Collection中国科学院国家天文台
Corresponding AuthorJin, Shuanggen
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Chai, Yi,Jin, Shuanggen. Two-Azimuth Co-Seismic Ionospheric Disturbances Following the 2020 Jamaica Earthquake From GPS Observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2021,126(9):13.
APA Chai, Yi,&Jin, Shuanggen.(2021).Two-Azimuth Co-Seismic Ionospheric Disturbances Following the 2020 Jamaica Earthquake From GPS Observations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,126(9),13.
MLA Chai, Yi,et al."Two-Azimuth Co-Seismic Ionospheric Disturbances Following the 2020 Jamaica Earthquake From GPS Observations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 126.9(2021):13.
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