DOI: 10.1002/2016GL069863
论文题名: Three-dimensional distribution of ionospheric anomalies prior to three large earthquakes in Chile
作者: He L. ; Heki K.
刊名: Geophysical Research Letters
ISSN: 0094-8860
EISSN: 1944-8591
出版年: 2016
卷: 43, 期: 14 起始页码: 7287
结束页码: 7293
语种: 英语
英文关键词: Global Positioning System
; preseismic ionospheric anomaly
; strong earthquake
; three-dimensional spatial structure
; total electron content
Scopus关键词: Geomagnetism
; Geophysics
; Global positioning system
; Ionosphere
; Tracking (position)
; Earthquake magnitudes
; Geomagnetic fields
; Ionospheric anomalies
; Ionospheric total electron content
; Strong earthquakes
; Surface electric charge
; Three-dimensional spatial structures
; Total electron content
; Earthquakes
; Chile earthquake 2010
; earthquake epicenter
; earthquake magnitude
; earthquake prediction
; electron density
; geomagnetic field
; GPS
; ionosphere
; spatial analysis
; three-dimensional modeling
英文摘要: Using regional Global Positioning System (GPS) networks, we studied three-dimensional spatial structure of ionospheric total electron content (TEC) anomalies preceding three recent large earthquakes in Chile, South America, i.e., the 2010 Maule (Mw 8.8), the 2014 Iquique (Mw 8.2), and the 2015 Illapel (Mw 8.3) earthquakes. Both positive and negative TEC anomalies, with areal extent dependent on the earthquake magnitudes, appeared simultaneously 20–40 min before the earthquakes. For the two midlatitude earthquakes (2010 Maule and 2015 Illapel), positive anomalies occurred to the north of the epicenters at altitudes 150–250 km. The negative anomalies occurred farther to the north at higher altitudes 200–500 km. This lets the epicenter, the positive and negative anomalies align parallel with the local geomagnetic field, which is a typical structure of ionospheric anomalies occurring in response to positive surface electric charges. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978864836&doi=10.1002%2f2016GL069863&partnerID=40&md5=7e349bbf9366bc9dd6c168d609d052ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9823
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geodesy and Geomatics, School of Resources and Civil Engineering, Northeastern University, Shenyang, China
Recommended Citation:
He L.,Heki K.. Three-dimensional distribution of ionospheric anomalies prior to three large earthquakes in Chile[J]. Geophysical Research Letters,2016-01-01,43(14).