Summary
Measurements of plasma parameters were made by the Intercosmos 24 satellite at altitudes between 2300 km and 2500 km in the interval of 16 to 12 hours prior to the initial shock of the destructive Iranian earthquake of 20 June 1990 (210009 UT, 37° N, 49·4° E, M=6·4), and before the strong aftershock of 21 June 1990 (090214 UT, M=5·8). The anomalous behaviour of the light ionospheric ions H+ and He+ and the cold electron temperature was observed over a wide region of the Northern Hemisphere before the earthquake. Sudden increases of energetic electron fluxes were observed over the Asian zone near the epicentre. These changes appear to be a part of the solid Earth — near space interaction occurring during the preparatory stage of the great seismic event.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. S. Derr: Earthquakes lights: a review of observations and present theories. Bull. Seismol. Soc. Ann.,63 (1973), 2177–2187.
G. A. Sobolev, S. S. Husamiddinov: Pulsed electromagnetic Earth and ionosphere field disturbances accompanying strong earthquakes. Earthquake Pred. Res.,3 (1985), 33–45.
L. M. Fishkova, M. B. Gokhberg, V. A. Pilipenko: Relationship between night airglow and seismic activity. Ann. Geophys.,3 (1985), 689–694.
M. Parrot, F. Lefeuvre: Correlation between GEOS VLF emissions and earthquakes. Ann. Geophys.,3 (1985), 737–748.
O. N. Serebryakova, S. V. Bilichenko, V. M. Chmyrev, M. Parrot, J. L. Rauch, F. Lefeuvre, O. A. Pokhotelov: Electromagnetic ELF radiation from earthquake regions as observed by low-altitude satellites. Geophys. Res. Lett.,19 (1992), 91–94.
J. Bošková, J. Šmilauer, F. Jiříček, P. Tříska: Is the ion composition of the outer ionosphere related to seismic activity? J. Atmosph. Terr. Phys.,55 (1993), 1689–1695.
J. Bošková, F. Jiříček, J. Šmilauer, P. Tříska, V. V. Afonin, V. G. Istomin: Plasmaspheric refilling phenomena observed by the Intercosmos 24 satellite. J. Atmosph. Terr. Phys.,55 (1993), 1595–1603.
K. Kudela, J. Matišin, F. K. Shuiskaya, O. S. Akentyeva, T. V. Romantsova, D. Venkatesan: Inner zone electron peaks observed by the "Active" satellite. J. Geophys. Res.,97 (1992), 8681–8683.
J. L. Horwitz, R. H. Comfort, P. G. Richards, M. O. Chandler, C. R. Chappell, P. Anderson, W. B. Hanson, L. H. Brace: Plasmasphere-Ionosphere Coupling. 2. Ion Composition Measurements at Plasmaspheric and Ionospheric Altitudes and Comparison With Modeling Results. J. Geophys. Res.,95 (1990), 7949–7953.
C. S. Roberts, M. Schulz: Bounce resonant scattering of particles trapped in the Earth's magnetic field. J. Geophys. Res.,73 (1968), 7361–7369.
Yu. I. Galperin, V. A. Gladyshev, N. V. Jorjio, V. I. Larkina, M. M. Mogilevsky: Energetic particles precipitation from the magnetosphere above the epicenter of approaching earthquake. Cosm. Issledovanija,30 (1992), 89–106 (in Russian).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bošková, J., Šmilauer, J., Tříska, P. et al. Anomalous behaviour of plasma parameters as observed by the intercosmos 24 satellite prior to the iranian earthquake of 20 June 1990. Stud Geophys Geod 38, 213–220 (1994). https://doi.org/10.1007/BF02295915
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02295915