Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements
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In this paper, the authors examined pre-earthquake ionospheric anomalies by the total electron content (TEC) derived from a ground-based receiver of the Global Positioning System (GPS).Abstract:
. In this paper we examine pre-earthquake ionospheric anomalies by the total electron content (TEC) derived from a ground-based receiver of the Global Positioning System (GPS). A 15-day running median of the TEC and the associated inter-quartile range (IQR) are utilized as a reference for identifying abnormal signals during all of the 20M≥6.0 earthquakes in the Taiwan area from September 1999 to December 2002. Results show that the pre-earthquake ionospheric anomalies appear during 18:00–22:00LT (LT=UT+8h) within 5 days prior to 16 of the 20M≥6.0 earthquakes. This success rate of 80% (=16/20%) suggests that the GPS TEC is useful to register pre-earthquake ionospheric anomalies appearing before large earthquakes. Key words. Ionosphere (ionospheric disturbances; ionosphere-atmosphere interactions)read more
Citations
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Journal ArticleDOI
A statistical investigation of preearthquake ionospheric anomaly
TL;DR: In this article, the authors investigated the relationship between variations of the plasma frequency at the ionospheric F2 peak foF2 and 184 earthquakes with magnitude M ≥ 5.0 during 1994-1999 in the Taiwan area.
Journal ArticleDOI
Seismoionospheric GPS total electron content anomalies observed before the 12 May 2008 Mw7.9 Wenchuan earthquake
Jann-Yenq Liu,Yuh Ing Chen,Chia-Hung Chen,Cheng Yan Liu,Chow-Son Chen,Masahide Nishihashi,J. Z. Li,Ya Qin Xia,K.-I. Oyama,Katsumi Hattori,Chien Hung Lin +10 more
TL;DR: In this paper, the global ionospheric map (GIM) was used to observe variations in the total electron content (TEC) of the global positioning system (GPS) associated with 35 M ≥ 6.0 earthquakes that occurred in China during the 10-year period of 1 May 1998 to 30 April 2008.
Journal ArticleDOI
Main phenomenological features of ionospheric precursors of strong earthquakes
TL;DR: In this article, the results of more than 10 years spent by the authors studying the variations in the ionosphere over seismically active regions several days or hours before strong earthquakes were summarized.
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Pre-earthquake signals: Underlying physical processes
TL;DR: In this article, it was shown that most crustal rocks contain dormant electronic charge carriers in the form of peroxy defects, O 3 Si / OO ⧹ SiO 3, known as positive holes.
Journal ArticleDOI
Ionospheric Precursors of Earthquakes; Recent Advances in Theory and Practical Applications
TL;DR: In this paper, a physical model was developed to bridge the traditional precursors of earthquakes and ionospheric ones, demonstrating that the latter belong to the same family, and a possible system of ground-based measurements and satellite monitoring was proposed for regional and global monitoring and possible short-term prediction of destructive earthquakes.
References
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Book
GPS satellite surveying
TL;DR: Elements of Satellite Surveying The Global Positioning System Adjustment Computations Least Squares Adjustment Examples Links to Physical Observations The Three-Dimensional Geodetic Model GPS Observables Propagation Media, Multipath, and Phase Center Processing GPS Carrier Phases Network Adjustments Ellipsoidal and Conformal Mapping Models Useful Transformations Datums, Standards, and Specifications Appendices References Abbreviations for Frequently Used References Indexes as discussed by the authors.
Journal ArticleDOI
Estimation of the transmitter and receiver differential biases and the ionospheric total electron content from Global Positioning System observations
TL;DR: In this paper, a method based on a Kalman filtering approach was proposed to estimate the biases in the GPS satellites and receivers and the total electron content at each GPS station using dual GPS data.
Journal ArticleDOI
GPS detection of ionospheric perturbations following the January 17, 1994, Northridge Earthquake
Eric Calais,J. Bernard Minster +1 more
TL;DR: In this article, the ionospheric electron content time series for several days preceding and following the January 17, 1994, M(sub w) = 6.7 Northridge earthquake was used to compute ionoispheric electron density.