Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ep%26s...58.1025a&link_type=abstract
Earth, Planets and Space, Volume 58, p. 1025-1031.
Physics
11
Scientific paper
By using data from the GPS network, we observed exceptional intensive quasi-periodical perturbations of the total electron content (TEC) caused by the great Sumatra-Andaman earthquake on 26 December 2004. The time period of the variations was about 15 min, their duration was about 1 hour. The amplitude of the TEC oscillations exceeded the amplitude of "background" fluctuations in this range of periods by one order of magnitude, at a minimum. They were registered 2-7 hours after the main shock at a distance from 1000 to 5000 km, both on the northwest and northeast outward from the epicenter. The most probable source of the observed oscillations appeared to be a seismic airwave generated by the sudden vertical displacement of the Earth's surface near the epicenter.
Afraimovich Eduard L.
Astafyeva Elvira I.
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