IJG  Vol.6 No.7 , July 2015
On the Diurnal Dependence of fbEs-Variations Due to Earthquakes
ABSTRACT
In the present work, disturbances of the half-transparency frequency fbEs of the ionospheric sporadic E-layer are investigated in connection with earthquakes. The fbEs-frequency is proportional to the square root of the maximum ionisation density of the sporadic E-layer. In this work, it is shown that in 2/3 of the cases, two days before a seismic shock with magnitude M > 5.5 and on the day of the shock, an increase of the fbEs-frequency is obtained at sunset hours at distances from the epicenter R < exp (M) km. In contrast, before sunrise, the fbEs-value decreases. The data analysed are obtained by the three vertical ionospheric sounding stations“Kokubunji”, “Yamagawa”, and “Wakkanai” during some tens of years.

Cite this paper
Liperovskaya, E. , Meister, C. , Hoffmann, D. , Silina, A. , Vasil’eva, N. (2015) On the Diurnal Dependence of fbEs-Variations Due to Earthquakes. International Journal of Geosciences, 6, 656-665. doi: 10.4236/ijg.2015.67053.
References
[1]   Pulinets, S.A. and Boyarchuk, K.A. (2004) Ionospheric Precursors of Earthquakes. Springer, Berlin.

[2]   Liperovsky, V.A., Pokhotelov, O.A., Liperovskaya, E.V., Parrot, M., Meister, C.-V. and Alimov, A. (2000) Modification of Sporadic E-Layers Caused by Seismic Activity. Survey in Geophysics, 21, 449-486. http://dx.doi.org/10.1023/A:1006711603561

[3]   Pulinets, S.A. and Davidenko, D. (2014) Ionospheric Precursors of Earthquakes and Global Electric Circuit. Advances in Space Research, 53, 709-723. http://dx.doi.org/10.1016/j.asr.2013.12.035

[4]   Liperovskaya, E.V., Meister, C.-V., Pokhotelov, O.A., Parrot, M., Bogdanov, V.V. and Vasilieva, N.E. (2006) On Es-Spread Effects in the Ionosphere Connected to Earthquakes. Natural Hazards and Earth System Sciences, 6, 740-744. http://dx.doi.org/10.5194/nhess-6-741-2006

[5]   Liperovskaya, E.V., Silina, A.S., Liperovsky, V.A., Meister, C.-V., Hoffmann, D.H.H. and Biagi, P.-F. (2012) Midnight Variations of Es-Spread of the Ionosphere before Earthquakes. Annales of Geophysics, 55, 119-123.

[6]   Liperovskaya, E.V., Meister, C.-V., Hoffmann, D.H.H. and Silina. A.S. (2015) On Diurnal Dependence and Spatial Scales of Seismo-Ionospheric Effects in the E-Layer. Physics and Chemistry of the Earth, Parts A/B/C, in Press. http://dx.doi.org/10.1016/j.pce.2015.01.008

[7]   Liu, J.Y., Chuo, Y.J., Shan, S.J., Tsai, Y.B., Chen, Y.I., Pulinets, S.A. and Yu. S.B. (2004) Pre-Earthquake Ionospheric Anomalies Registered by Continuous GPS TEC Measurements. Annales Geophysicae, 22, 1585-1593. http://dx.doi.org/10.5194/angeo-22-1585-2004

[8]   Liu, J.Y. Chen, Y.I. Chuo, Y.J. and Chen. C.S. (2006) A Statistical Investigation of Preearthquake Ionospheric Anomaly. Journal of Geophysical Research, 111, A05354.
http://dx.doi.org/10.1029/2005JA011333

[9]   Ondoh, T. and Hayakawa, M. (1999) Anomalous Occurrence of Sporadic-E Layers before the Hyogoken Nanbu Earthquake, M7.2 of January 17, 1995. In: Hayakawa, M., Ed., Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes, TERRAPUB, Tokyo, 629-639.

[10]   Ondoh, T. and Hayakawa, M. (2006) Synthetic Study of Precursory Phenomena of the M7.2 Hyogoken Nanbu Earthquake. Physics and Chemistry of the Earth, Parts A/B/C, 31, 378-388.
http://dx.doi.org/10.1016/j.pce.2006.02.017

[11]   Ondoh, T. (2004) Anomalous Sporadic-E Ionization before a Great Earthquake. Advances in Space Research, 34, 1830-1835. http://dx.doi.org/10.1016/j.asr.2003.05.044

[12]   Chuo, Y.J., Liu, J.Y., Kamogawa, M. and Chen. Y.I. (2002) The Anomalies in the Prior to Taiwan Earthquakes. Seismo-Electromagnetics: Lithosphere-Atmosphere-Ionosphere Couplings, Hayakawa M., Molchanov O.A. (eds.), TERRAPUB, Tokyo, 309-312.

[13]   Liperovsky, V.A., Meister, C.-V., Liperovskaya, E.V., Vasil’eva, N.E. and Alimov, O.A. (2005) On Es-Spread Effects in the Ionosphere before Earthquakes. Natural Hazards and Earth System Sciences, 5, 59-62. http://dx.doi.org/10.5194/nhess-5-59-2005

[14]   Silina, A.S., Liperovskaya, E.V., Vasil'eva, N.E. and Alimov, O.A. (2010) The Influence of the Processes of Earthquakes Preparation on Variations of Parameters of the Ionosphere Sporadic E Layer. 5th International Conference on Solar-Terrestrial Relations and Physics of Earthquake Precursors, Paratunka, 2-7 August 2010, Collection of Reports, eds. Shevtsov B.V., Bogdanov V.V., Petropavlovsk-Kamchatsky; IKIR FEB RAS, 440-444.

[15]   Dobrovolsky, I.R., Zubkov, S.I. and Myachin, V.I. (1979) Estimation of the Size of Earthquake Preparation Zones. Pure and Applied Geophysics, 117, 1025-1044. http://dx.doi.org/10.1007/BF00876083

[16]   Whitehead, J.D. (1989) Recent Work on Mid-Latitude and Equatorial Sporadic E. Journal of Atmospheric and Terrestrial Physics, 51, 401-424. http://dx.doi.org/10.1016/0021-9169(89)90122-0

 
 
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