Seismic Effects in F2 Region Related to Electron Temperature


  • A. K. Sharma Shivaji University Kolhapur, India
  • A. V. Patil Shivaji University Kolhapur, India
  • R. V. Bhonsle Shivaji University Kolhapur, India
  • R. S. Vhatkar Shivaji University Kolhapur, India
  • P. Subrahmanyam New Delhi National Physical Laboratory, India



The effect of earthquakes in the ionospheric F2 range was studied using the Indian satellite SROSS-C2 data on the cosmic electron temperature around the Indian sector in the ranges 0-34 ° N and 40-100 ° E for the period 1995-1997. Five episodes of earthquakes were analyzed and the observed anomalies at an average electron temperature were 29 to 10% higher than in the preceding days, and 16 to 4% higher than on days after the earthquake, and a latitudinal variation of this temperature. It is shown that the increase in this temperature was the maximum on the day preceding the earthquake, and for several hours before and after it. The anomalies observed around (in the ± 2-degree latitude range) were the epicenter of the earthquake. They were probably observed due to electromagnetic radiation during the earthquake activity. The period from 1995 to 1997 for this study was taken as a period of quiet geomagnetic conditions.


Blanc E. Observations in the upper atmosphere of infrasonic waves from natural or Artificial sources: a summary // Annales Geophysicae. - 1985. - 3. - Р. 673-688.

Boskova J., Smilauer J., Jiricek F., Triska P. Is the ion composition of outer Ionosphere related to seismic activity? // J. Atmospheric and Terrestrial Physics. - 1993. - 55, № 13. - Р. 1689-1695.

Boskova J., Smilauer J., Triska P., Kudela K. Anomalous behavior of plasma Parameters as observed by the Intercosmos 24 satellite prior to the Iranian Earthquake of 20 June 1990 // Studia Geophysica et Geodaetica. - 1994. - 38. - Р. 213.

Garg S. C., Das U. N. Aeronomy experiment on SROSSC2 // J. Spacecraft Technology. - 1995. - 5. - Р. 11- 15.

Gokhberg M. B., Morgounov V. A., Pokhotelov O. A. Earthquake Prediction: Seismo-Electromagnetic Phenomena. - Gordon and Breach Science Publishers, 1995.

Gokhberg M. B., Pilipenko V. A., Pokhotelov O. A. On seismic precursors in the Ionosphere // Izv. USSR Academy of Sciences. Physics of the Earth Series, 1983. - 10. - Р. 17-13.

Grimalsky V. V., Hayakawa M., Ivchenko V. N., Rapoport Yu. G., Zadorozhniic V. I. Penetration of an electrostatic field from the lithosphere into the ionosphere and its effect on the D-region before earthquakes // J. Atmospheric and Solar-Terrestrial Physics. - 2003. - 65. - Р. 391-407.

Hattori K., Akinaga Y., Hayakawa M., Yumoto K., Nagao T., Uyeda S. ULF magnetic anomaly preceding the 1997 Kagoshima earthquakes // Terra Scientific Publishing Company Tokyo, 2002. - Р. 19-28.

Hayakawa M. Electromagnetic Precursors of Earthquakes: Review of Recent Activities // Rev. Radio Science, 1993-1996. - Oxford: Oxford University Press, 1997. - Р. 807-818.

Hayakawa M. VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes // Sensors. - 2007. - 7. - Р. 1141-1158. Hayakawa M., Fusinawa Y. Electromagnetic phenomenon related to earthquake predication // Terra Scientific Publishing Company Tokyo. - 1994. - P. 77.

Hayakawa M., Hattori K., Ohta K. Monitoring of ULF (ultra-low-frequency) geomagnetic variations associated with earthquakes // Sensors. - 2007. - 7. - Р. 1108-1122.

Hayakawa M., Kawate R., Molchanov O. A., Kiyohumi Y. Results of Ultra-Low-Frequency magnetic field measurements during the Guam earthquake of 8 August 1993 // Geophys. Res. Lett. - 1996. - 23. - Р. 241-244.

Liperovsky V. A., Pokhotelov O. A., Liperovskaya E. V., Parrot M., Meister C. V., Alimov A. Modification of sporadic E-layers caused by seismic activity // Surveys in Geophysics. - 2000. - 21. - Р. 449-486.

Liperovsky V. A., Popov K. V., Pokhotelov O. A., Meister C.-V., Liperovskaya E. V., Alimov O. A. Ionospheric fbEs frequency variations with time in a Seismically active region // Izv. Phys. Sol. Earth. - 1999. - 35, № 12. - Р. 1043-1048.

Liperovsky V. V., Pokhotelov O. A., Shalimov S. L. Ionospheric precursors to Earthquake. - Moscow: Nauka, 1992. - Р. 304.

Miyaki K., Hayakawa M., Molchanov O. A. The role of gravity waves in the ithosphere-ionosphere coupling, as revealed from the subionospheric LF propagation data // Seismo-Electromagnetics (Lithosphere - Atmosphere - Ionosphere Coupling). - Tokyo: TERRAPUB, 2002. - Р. 229-232.

Molchanov O. A, Hayakawa M., Afonin V. V., Akentieva O. A., Mareev E. A. Possible influence of seismicity by gravity waves on ionospheric equatorial anomaly from data of IK- 24 satellite1. Search for idea of seismo-ionosphere coupling // Seismo- Electromagnetics (Lithosphere-Atmosphere- Ionosphere Coupling). - Tokyo: TERRAPUB, 2002. - Р. 275-285.

Molchanov O. A., Hayakawa M., Rafalsky V. A. Penetration characteristics of Electromagnetic emissions from an underground seismic source into the atmosphere, ionosphere, and magnetosphere // J. Geophys. Res. - 1995. - 100. - Р. 1691-1712.

Parrot M., Achache J., Berthelier J. J., Blanc E., Deschamps A., Lefeuvre F., Menvielle M., Plantet J. L., Tarits P., Villain J. P. High-frequency seismo-Electromagnetic effects // Phys. Earth Planet. Int. - 1993. - 77. - Р. 65-83.

Popov K. V., Liperovsky V. A., Alimov O. A. Modification of the ionospheric Flayer density variation spectra at night time during earthquake preparation // Izv. Phys. Sol. Earth. - 1996. - 32, № 1. - Р. 85-88.

Popov K. V., Liperovsky V. A., Meister C. V., Biagi P. F., Liperovskaya E. V., Silina A. S. On ionospheric precursors of earthquakes in scales of 2-3 h // Phys. Chem. Earth. - 2004. - 29. - Р. 529-535.

Pulinets S. A., Legenka A. D., Gaivoronskaya T. V., Depuev V. Kh. Main Phenomenological features of ionospheric precursors of strong earthquakes // J. Atmospheric and Solar Terrestrial Physics. - 2003. - 65. - Р. 1337-1347.

Pulinets S., Boyarchuk K. Ionospheric Precursors of Earthquakes. - Berlin: Springer, 2004. - 315 р.

Sarkar S., Gwal A. K., Parrot M. Ionospheric variations observed by the DEMETER satellite in the midlatitude region during strong earthquakes // J. Atmospheric and Solar Terrestrial Physics. - 2007. - 69. - Р. 1524-1540.

Shalimov S. L. Lithosphere-ionosphere relationship: a new way to predict Earthquakes? // Episodes, International Geophysical Newsmagazine. - 1992. - 15. - Р. 252-254.

Sharadze Z. S., Dzhaparidze G. A., Zhvaniya Z. K., Kvavadze N. D., Kikvilashvili G. B., Ziadze Z. L., Matiashvili T. G., Mosashvili N. V., Nikolayshvili N. Sh. Disturbance in the ionosphere and geomagnetic field associated with the Spitak earthquake // Izv. Phys. Sol. Earth. - 1991. - 27, № 11. - Р. 106-116.

Shvets A. V., Hayakawa M., Molchanov O. A., Ando Y. A study of ionospheric response to regional seismic activity by VLF radio sounding // Phys. Chem. Earth. - 2004. - 29. - Р. 627-637.

Silina S. A., Liperovskaya E. V., Liperovsky V. A., Meister C. V. Ionospheric phenomenon before strong earthquakes // Natural Hazards and earth system sciences. - 2001. - 1. - Р. 113-118.

Sorokin V. M., Chmyrev V. M. Electrodynamic model of ionospheric precursors to earthquakes and certain types of disasters // Geomagnetism and Aeronomy. - 2002. - 42. - Р. 784-792.

Sorokin V. M., Chmyrev V. M., Yaschenko A. K. Electrodynamic model of the lower atmosphere and the ionosphere coupling // J. Atmospheric and Solar Terrestrial Physics. - 2001. - 63. - Р. 1681-1691.

Sorokin V. M., Chmyrev V. M., Yaschenko A. K. Possible DC electric field in the ionosphere related to seismicity // Advances in Space Research. - 2006a. - 37. - Р. 666-670.

Sorokin V. M., Yaschenko A. K., Chmyrev V. M., Haya kawa M. DC electric field formation in the mid-latitude ionosphere over typhoon and earthquake regions // Phys. Chem. Earth. - 2006b. - 31. - Р. 454-461.




How to Cite

Sharma, A. K., Patil, A. V., Bhonsle, R. V., Vhatkar, R. S., & Subrahmanyam, P. (2011). Seismic Effects in F2 Region Related to Electron Temperature. Geofizicheskiy Zhurnal, 33(2), 105–115.