Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

By Jann‐Yenq Liu, Y. Chuo, S. Shan, Y. Tsai, Yuh-Ing Chen, Sergey Pulinets, S. B. Yu. 2004

526 citations recorded by the source corpus.

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)

Subfields: Artificial Intelligence, Geophysics

View Paper: https://www.semanticscholar.org/paper/cde0cf0d78c05d5f98ffbb5ae5de94680bf8cbde

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Citations in the corpus

A statistical analysis of ionospheric anomalies before 736 M6.0+ earthquakes during 2002-2010 (2011, unknown): “Thus the ionospheric anomalies before the earthquake near the epicenter are studied widely by many geophysicists and a number of papers have reported on deviations in the daily values of the critical frequency of the F2 layer (foF2) and/or total electron content (TEC) in the vicinity of an epicenter”
A statistical investigation of preearthquake ionospheric anomaly (2006, background): “Recently, seismoionospheric phenomena have received considerable discussions [Hayakawa and Molchanov, 2002; Liu et al., 2004 ].”
Is an unusual large enhancement of ionospheric electron density linked with the 2008 great Wenchuan earthquake (2008, background): “The temporal parameters of ionospheric precursors, 5-day interval (which means that ionospheric precursors may be detected within the time interval 1–5 days before the earthquake), was statistically suggested by Liu et al. [2004] after processing continuous global positioning system (GPS) TEC data”
Atmosphere-ionosphere response to the M9 Tohoku earthquake revealed by multi-instrument space-borne and ground observations: Preliminary results (2011, background): “The observational evidence, from the last twenty years, provides a significant pattern of transient anomalies preceding earthquakes [Tronin et al., 2002; Liu et al., 2004; Pulinets and Boyarchuk, 2004; Tramutoli et al., 2004, Parrot 2009, Oyama 2011].”
An improved coupling model for the lithosphere‐atmosphere‐ionosphere system (2014, background): “…and TEC (total electron content) variations before strong earthquakes [Liu et al., 2000; Liu et al., 2001; Chuo, 2002; Pulinets and Legen’ka, 2003; Liu et al., 2004; Zhao et al., 2008; Liu et al., 2009; Liu et al., 2010; Klimenko et al., 2011; Zolotov et al., 2011; Heki, 2011; Namgaladze et al.,…”
GNSS ionospheric seismology: Recent observation evidences and characteristics (2015, background): “Since the first time the total electron content (TEC) anomalous signal was observed by Calais and Minster (1995) after the Northridge earthquake in California on January 17, 1994, numerous studies have been intended to study pre/co-seismic ionospheric disturbances related to earthquakes (Liu et al.,”
Ionospheric Precursors of Earthquakes; Recent Advances in Theory and Practical Applications (2004, methodology): “In any case, the acoustic hypothesis cannot explain the observed experimentally very strong variations of TEC before strong earthquakes (Liu et al. 2004).”
Electron and ion density variations before strong earthquakes (M>6.0) using DEMETER and GPS data (2010, methodology): “Liu et al. (2004) statistically described the temporal parameters of the seismo-ionospheric precursors detected during 1–5 days prior to the earthquakes using TEC data for 20 major earthquakes in Taiwan.”