We suggest a possible explanation of the influence of pre-seismic activity on the registration rate of natural ELF(extremely low frequency)/VLF(very low frequency) pulses and the changes of their characteristics. The main idea is as follows. The distribution of the electric field around a thundercloud depends on the conductivity profile of the atmosphere. Quasi-static electric fields of a thundercloud decrease in those tropospheric regions where an increase of air conductivity is generated by pre-seismic activities due to emanation of radioactive gas and water into the lower atmosphere. The electric field becomes reduced in the lower troposphere, and the probability decreases of the cloud-to-ground (CG) strokes in such “contaminated” areas. Simultaneously, the electric field grows inside and above the thunderclouds, and hence, we anticipate a growth in the number of horizontal and tilted inter-cloud (or intra-cloud) (both termed as IC discharges) strokes. Spatial orientation of lightning strokes reduces vertical projection of their individual amplitudes, while the rate (median number strokes per a unit time) of discharges grows. We demonstrate that channel tilt of strokes modifies the spectral content of ELF/VLF radio noise and changes the rate of detected pulses during the earthquake preparation phase.
References
[1]
Hayakawa, M. and Molchanov, O.A (2002) Seismo Electromagnetics: Lithosphere-Atmosphere-Ionosphere Coupling. TERRAPUB, Tokyo.
[2]
Pulinets, S. and Boyarchuk, K. (2004) Ionospheric Precursors of Earthquakes. Springer, Berlin.
[3]
Molchanov, O.A. and Hayakawa, M. (2008) Seismo Electromagnetics and Related Phenomena: History and Latest Results. TERRAPUB, Tokyo.
[4]
Hayakawa, M. (2015) Earthquake Prediction with Radio Techniques. Wiley and Sons, Singapore. https://doi.org/10.1002/9781118770368
[5]
Sorokin, V., Chmyrev, V. and Hayakawa, M. (2015) Electrodynamic Coupling of Lithosphere-Atmosphere-Ionosphere of the Earth. NOVA Publisher, New York.
[6]
Ouzounov,D.,Pulinets,S.,Hattori,K. andTaylor,P.(2018) Pre-Earthquake Processes: A Multidisciplinary Approach to Earthquake Prediction Studies.Wiley, New York. https://doi.org/10.1002/9781119156949
[7]
Gokhberg, M.B., Morgunov, V.A., Yoshino, T. and Tomizawa, I. (1982) Experimental Measurement of Electromagnetic Emissions Possibly Related to Earthquakes in Japan. Journal of Geophysical Research: Solid Earth, 87, 7824-7828. https://doi.org/10.1029/JB087iB09p07824
[8]
Oike, K. and Yamada, T. (1994) Relationship between Earthquakes and Electromagnetic Noises in the LF and VLF Ranges. In Hayakawa, M., Ed., Electromagnetic Phenomena Associated with Earthquake Prediction, TERRAPUB, Tokyo, 115-130.
[9]
Asada, T., Baba, H., Kawazoe, M. and Sugiura, M. (2001) An Attempt to Delineate Very Low Frequency Signals Associated with Earthquakes. Earth Planets Space, 53, 55-62. https://doi.org/10.1186/BF03352362
[10]
Fujinawa, Y., Takahashi, K., Matsumoto, T. and Kawakami, N. (1999) Sources of Earthquake Related VLF Electromagnetic Signals. In: Hayakawa, M., Ed., Atmospheric and IonosphericeElectromagnetic Phenomena Associated with Earthquakes, TERRAPUB, Tokyo, 405-415.
[11]
Hayakawa,M.,Schekotov,A.,Izutsu,J. andNickolaenko,A.P. (2019)SeismogenicEffectsinULF/ELF/VLFElectromagneticWaves. International Journal of Electronics and Applied Research,6, 1-86. https://doi.org/10.33665/IJEAR.2019.v06i02.001
[12]
Wakita, H. (1996) Radon Observation and Earthquake Prediction. Japanese Journal of Health Physics, 31, 215-222. https://doi.org/10.5453/jhps.31.215
[13]
Yasuoka, Y., Nagahama, H. and Ishikawa, T. (2010) Anomalous Radon Concentration Prior to an Earthquake. Lambert Academic Publishing, Dudweiler.
[14]
Igarashi, G., Saeki, S., Takahata, N., Sumikawa, K., Tasaka, S., Sasaki, Y., Takahashi, M. and Sano, Y. (1995) Ground-Water Radon Anomaly before the 1995 Kobe Earthquake in Japan. Science, 269, 60-61. https://doi.org/10.1126/science.269.5220.60
[15]
Yasuoka, Y. and Shonogi, M. (1997) Anomaly in Atmospheric Radon Concentration: A Possible Precursor of the 1995 Kobe Earthquake, Japan. Health Physics, 72, 759-761. https://doi.org/10.1097/00004032-199705000-00012
[16]
Pulinets, S., Ouzounov, D., Karelin, A. and Boyarchuk, K. (2022) Earthquake Precursors in the Atmosphere and Ionosphere: New Concepts. Springer, Dordrecht. https://doi.org/10.1007/978-94-024-2172-9
[17]
Blackett, M., Wooster, M.J. and Malamud, B.D. (2011) Exploring Land Surface Temperature Earthquake Precursors: A Focus on the Gujarat (India) Earthquake of 2001. Geophysical Research Letters, 38, L15303 https://doi.org/10.1029/2011GL049428
[18]
Shah, M., Khan, M., Ullah, H. and Ali, S. (2018) Thermal Anomalies Prior to the 2015 Gorkha (India) Earthquake from MODIS Land Surface Temperature and Outgoing Logwave Radiation, Geodyn. Tectonophys, 9, 123-138. https://doi.org/10.5800/GT-2018-9-1-0341
[19]
Piscini, A., De Santis, A., Marchetti, D. and Cianchini, G. (2017) A Multiparametric Climatological Approach to Study the 2016 Amatrice-Norcia (Central Italy) Earthquake Preparatory Phase. Pure and Applied Geophysics, 174, 3673-3688. https://doi.org/10.1007/s00024-017-1597-8
[20]
Ghosh, S., Sasmal, S., Potirakis, S. and Hayakawa, M. (2023) Thermal Anomaly Observed during the Crete Earthquake on 27 September 2021. Geosciences, 14, Article 73. https://doi.org/10.3390/geosciences14030073
[21]
Ghosh, S., Chowdhury, S.K., Kundu, S., Sasmal, S., Politis, D.Z., Potirakis, S.M., Hayakawa, M., Chakraborty, S. and Chakrabarti, S.K. (2022) Unusual Surface Latent Heat Flux Variations and Their Critical Dynamics Revealed before Strobng Eartquakes. Entropy, 24, Article 23. https://doi.org/10.3390/e24010023
[22]
Ouzounov, D., Liu, D., Chunli, K., Cervone, G., Kafatos, M. and Taylor, P. (2007) Outgoing Long Wave Radiation Variability from Satellite Data Prior to Major Earthquakes. Tectonophysics, 431, 211-220. https://doi.org/10.1016/j.tecto.2006.05.042
[23]
Venkatanathan, N. and Natyaganov, V. (2014) Outgoing Longwave Radiations as Pre-Earthquake Signals: Preliminary Results of 24 September 2013 M7.7 Earthquake. Current Science, 106, 1291-1297.
[24]
Xiong, P., Shen, X.H., Bi, X.X., Kang, C.L., Chen, J.Z., Jing, F. and Chen, Y.(2010) Study of Outgoing Longwave Radiation Anomalies Associated with Haiti Earthquake. Natural Hazards and Earth System Sciences, 10, 2169-2178. https://doi.org/10.5194/nhess-10-2169-2010
[25]
Bliokh, P.V. (1999) Variations of Electric Fields and Currents in the Lower Ionosphere Produced by Conductivity Growth of the Air above the Future Earthquake Center. In: Hayakawa, M., Ed., Atmospheric and Ionospheric Electromagnetic Phenomena Associated with Earthquakes, TERRAPUB, Tokyo, 829-838.
[26]
Sorokin, V.M., Yaschenko, A.K. and Hayakawa, M. (2007) A Perturbation of DC Electric Field Caused by Light Ion Adhesion to Aerosols during the Growth in Seismic-Related Atmospheric Radioactivity. Natural Hazards and Earth System Sciences, 7, 155-163. https://doi.org/10.5194/nhess-7-155-2007
[27]
Sorokin, V.M., Chmyrev, V.M. and Hayakawa, M. (2020) A Review on Electrodynamic Influence of Atmospheric Processes to the Ionosphere. Open Journal of Earthquake Research, 9, 113-141. https://doi.org/10.4236/ojer.2020.92008
[28]
Omori, Y., Yasuoka, Y., Nagahama, H., Kawada, Y., Ishikawa, T., Tokonami, S. and Shinogi, M. (2007) Anomalous Radon Emanation Linked to Preseismic Phenomena. Natural Hazards and Earth System Sciences, 7, 629-635. https://doi.org/10.5194/nhess-7-629-2007
[29]
Omori, Y., Nagahama, H., Kawada, Y., Yasuoka, Y., Ishikawa, T. and Shinogi, M. (2009) Preseismic Alteration of Atmospherical Conditions Due to Anomalous Rado Emanation. Physics and Chemistry of the Earth, Parts A/B/C, 34, 435-440. https://doi.org/10.1016/j.pce.2008.08.001
[30]
Kondo, G. (1968) The Variation of the Atmospheric Electric Field at the Time of Earthquake. Memoirs of Kakioka Observatory Japan, 13, 17-23.
[31]
Price, E.T. (1976) Atmosphertic Electricity and Earthquake Prediction. Geophysical Research Letters, 3, 185-188. https://doi.org/10.1029/GL003i003p00185
[32]
Vershinin, E.F., Buzevich, A.V., Yumoto, K., Saita, K. and Tanaka, Y. (1999) Correlation of Seismic Activity with Electromagnetic Emissions and Variations in Kamchatka, In: Hayakawa, M., Ed., Atmospheric and IonosphericElectromagneticPhenomenaAssociated with Earthquakes, TERRAPUB, Tokyo, 513-517.
[33]
Nie, L. and Zhang, X. (2023) Identification and Analysis of Multi-Station Atmospheric Electric Field Anomalies before the Yangbi Ms6.4 Earthquake on 21 May 2021. Atmosphere, 14, Article 1579. https://doi.org/10.3390/atmos14101579
[34]
Liu, J.Y., Chen, Y.I., Huang, C.H., Ho, Y.Y. and Chen, C.H. (2015) A Statistical Study of Lightning Activities and M > 5 Earthquakes in Taiwan Region during 1993-2004. Surveys in Geophysics, 36, 851-859. https://doi.org/10.1007/s10712-015-9342-2
[35]
Molchanov, O. (1999) Electric Field from Thunderstorm in the Conductive Atmosphere. Journal of Atmospheric Electricity, 19, 87-99. https://doi.org/10.1541/jae.19.87
[36]
Hayakawa, M., Molchanov, O.A. and NASDA/UEC Team (2004) Summary Report of NASDA’s Earthquake-Remote Sensing Frontier Project. Physics and Chemistry of the Earth, Parts A/B/C, 29, 599-605. https://doi.org/10.1016/j.pce.2003.08.062
[37]
Hayakawa, M. (2009) Electromagnetic Phenomena Associated with Earthquakes. Institute of Electrical Engineers of Japan Transactions on Fundamentals and Materials, 126, 211-214.
[38]
Mondal, D., Hobara, Y., Kikuchi, H. and Lapierre, J. (2021) Thnderstorms and Total Lightning Characteristics Causing Heavy Precipitation in Japan: A Case Study. URSI Radio Science Bulletin, 378, 70-76. https://doi.org/10.23919/URSIRSB.2021.10292817
[39]
Singh, R.P., Singh, B., Mishra, P.K. and Hayakawa, M. (2003) On the Lithosphere-Atmosphere Coupling of Seismo-Electromagnetic Signals. Radio Science, 38, Article 1065. https://doi.org/10.1029/2002RS002683
[40]
Molchanov, O.A., Hayakawa, M. and Rafalsky, V.A. (1994) Penetration of Electromagnetic Emissions from an Underground Seismic Source into the Atmosphere, Ionosphere and Magnetosphere. In: Hayakawa, M. and Fujinawa, Y., Eds., Electromagnetic Phenomena Related to Earthquake Prediction, TERRAPUB, Tokyo, 565-606.
[41]
Uman, M.A. (1987) The Lightning Discharge. Academic Press, San Diego.
[42]
Ogawa, T. (1995), Lightning Currents. In: Volland, H., Ed., Handbook of Atmospheric Electrodynamics, CRC Press, Florida, 93-136.
[43]
MacGorman, D.R. and Rust, W.D. (1998) The Electrical Nature of Storms. Oxford University Press, Oxford.
[44]
Rakov, V. and Uman, R.A. (2003) Lightning: Physics and Effects. Cambridge University Press, Cambridge. https://doi.org/10.1017/CBO9781107340886
[45]
Marshall, I.H., Hale, L.C., Croskey, C.L. and Lyons, W.A. (1998) Electromagnetics of Sprite and Elve-Associated Sferics. Journal of Atmospheric and Solar-Terrestrial Physics, 60, 771-786. https://doi.org/10.1016/S1364-6826(98)00014-5
[46]
Jones, D.L. (1970) Electromagnetic Radiation from Multiple Return Strokes of Lightning. Journal of Atmospheric and Terrestrial Physics, 32, 1077-1093. https://doi.org/10.1016/0021-9169(70)90119-4
[47]
Nickolaenko, A.P. and Hayakawa, M. (2002) Resonances in the Earth-Ionosphere Cavity. Kluwer Academic Publishers, London.
[48]
Nickolaenko, A.P. and Hayakawa, M. (1998) Electric Fields Produced by Lightning Discharges. Journal of Geophysical Research: Atmospheres, 103, 17175-17189. https://doi.org/10.1029/98JD01163
Nickolaenko A.P. (1981) One-Dimension Probability Distribution Function of the Vertical Electric Component of ELF Terrestrial Radio Noise. Radiophysics and Quantum Electronics, 24, 34-42. (In Russian) https://doi.org/10.1007/BF01034349
[51]
Nickolaenko, A. and Hayakawa, M. (2014) Schumann Resonance for Tyros. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54358-9
[52]
Hayakawa, M., Schekotov, A., Izutsu, J., Nickolaenko, A.P. and Hobara, Y. (2023) Seismogenic ULF/ELF Wave Phenomena: Recent Advances and Future Perspectives. Open Journal of Earthquake Research, 12, 45-113. https://doi.org/10.4236/ojer.2023.123003
[53]
Schekotov, A., Molchanov, O.A., Hayakawa, M., Fedorov, E.N., Chebrov, V.N., Sinitsin, V.I., Gordeev, E.E., Belyaev, G.G. and Yagova, N.V. (2007) ULF/ELF Magnetic Field Variations from Atmosphere Induced by Seismicity. Radio Science, 42, RS6S90. https://doi.org/10.1029/2005RS003441
[54]
Schekotov,A.,Fedorov,E.,Molchanov,O.A. andHayakawa,M. (2013)LowFrequencyElectromagneticPrecursorsasaProspectforEarthquakePrediction.In: Hayakawa, M., Ed., Earthquake Prediction Studies: Seismo Electromagnetics, TERRAPUB, Tokyo, 81-99.
[55]
Schekotov, A., Zhou, H.J., Qiao, X.L. and Hayakawa, M. (2016) ULF/ELF Atmospheric Radiation in Possible Association with the 2011 Tohoku Earthquake as Observed in China. Earth Science Research, 5, 47-58. https://doi.org/10.5539/esr.v5n2p47
