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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 18:00–22:00LT (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.
Originally posted by Phage
Total Electron Content is a measure of the amount of ions trapped within the magnetosphere. It is of concern to satellite operators.
Whenever there is an increase in geomagnetic activity, the TEC is seen to drop. The activity causes the ions to precipitate at the magnetic poles. If the activity is strong enough it creates auroral displays when the ions encounter the neutral atoms of the upper atmosphere.
There is little evidence of a relationship between geomagnetic activity and earthquakes.
www.abovetopsecret.com...
Originally posted by Phage
There is little evidence of a relationship between geomagnetic activity and earthquakes.
www.abovetopsecret.com...
This success rate of 80% (=16/20%) suggests that the GPS TEC is useful to register pre-earthquake ionospheric anomalies appearing before large earthquakes.
J. Y. Liu1,2, Y. J. Chuo3, S. J. Shan1, Y. B. Tsai4, Y. I. Chen5, S. A. Pulinets6, and S. B. Yu7
1Institute of Space Science, National Central University, Taiwan
2Center for Space and Remote Sensing Research, National Central University, Taiwan
3Department of Information Management, Ling-Tung College, Taiwan
4Institute of Geophysics, National Central University, Taiwan
5Institute of Statistics, National Central University, Taiwan
6Institute of Geophysics, National Autonomous University of Mexico, Mexico
7Institute of Earth Sciences, Academia Sinica, Taiwan
Originally posted by PuterMan
Can this be debunked?
>snip< image
I leave it to you to decide if this debunks it!