NDLI: Evolution of seismo-ionospheric disturbances according to the data of dense network of GPS stations

Content Provider	Springer Nature Link
Author	Kiryushkin, V. V. Afraimovich, E. L. Astafyeva, E. I.
Copyright Year	2011
Abstract	The evolution of seismo-ionospheric disturbances accompanied strong destructive earthquakes in the region of Kuril and Japan Islands on October 4, 1994, September 25, 2003, and November 15, 2006 is studied in the paper. For determination of the dynamics of spatial-temporal and amplitude parameters of disturbances in the total electron content (TEC) on the basis of the Japan network of receiving GPS stations GEONET and Korean network KGN, the method of drawing “distance-time” diagrams and quasi-optimal algorithm of spatial-temporal processing of the GPS network data was used. The ionospheric response was detected at a distance D from the epicenter up 2500 km. The maximal value of the disturbance amplitude is observed at D = 400–600 km. For the September 25, 2003 and November 15, 2006 earthquakes, the velocity V of propagation of the dominant disturbance mode is independent of the distance and equal to 850 and 1100 m/s, respectively. At a distance D ∼ 600 km, the wave disturbance from the main shock of the October 4, 1994 earthquake is split into two modes: the velocity of the “fast mode” of the disturbance increases with distance from 1500 to 2400 m/s, while the velocity of the “slow mode” V = 600 m/s does not depend on D. Possible interpretation of the obtained results is given.
Starting Page	227
Ending Page	239
Page Count	13
File Format	PDF
ISSN	00109525
Journal	Cosmic Research
Volume Number	49
Issue Number	3
e-ISSN	16083075
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-05-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astrophysics and Astroparticles Extraterrestrial Physics, Space Sciences Astronomy, Astrophysics and Cosmology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Aerospace Engineering Space and Planetary Science

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