Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

J. Y. Liu; Y. J. Chuo; S. J. Shan; Y. B. Tsai; Y. I. Chen; S. A. Pulinets; S. B. Yu

doi:10.5194/angeo-22-1585-2004

Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

J. Y. Liu, Y. J. Chuo, S. J. Shan, Y. B. Tsai, Y. I. Chen, S. A. Pulinets, S. B. Yu

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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 18:00-22:00 LT (LT=UT+8h) within 5 days prior to 16 of the 20 M≧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.

Original language	English
Pages (from-to)	1585-1593
Number of pages	9
Journal	Annales Geophysicae
Volume	22
Issue number	5
DOIs	https://doi.org/10.5194/angeo-22-1585-2004
State	Published - 2004

Keywords

Ionosphere (ionospheric disturbances; ionosphere-atmosphere interactions)

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title = "Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements",

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 18:00-22:00 LT (LT=UT+8h) within 5 days prior to 16 of the 20 M≧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.",

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T1 - Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

AU - Liu, J. Y.

AU - Chuo, Y. J.

AU - Shan, S. J.

AU - Tsai, Y. B.

AU - Chen, Y. I.

AU - Pulinets, S. A.

AU - Yu, S. B.

PY - 2004

Y1 - 2004

N2 - 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 18:00-22:00 LT (LT=UT+8h) within 5 days prior to 16 of the 20 M≧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.

AB - 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 18:00-22:00 LT (LT=UT+8h) within 5 days prior to 16 of the 20 M≧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.

KW - Ionosphere (ionospheric disturbances; ionosphere-atmosphere interactions)

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DO - 10.5194/angeo-22-1585-2004

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VL - 22

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EP - 1593

JO - Annales Geophysicae

JF - Annales Geophysicae

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Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

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Keywords

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