Influences of Solar Cycles on Earthquakes
Marilia Tavares, Anibal Azevedo
DOI: 10.4236/ns.2011.36060   PDF    HTML     12,726 Downloads   25,009 Views   Citations


This paper inspects possible influence of solar cycles on earthquakes through of statistical analyses. We also discussed the mechanism that would drive the occurrence of increasing of earthquakes during solar maxima. The study was based on worldwide earthquakes events during approximately four hundred years (1600-2010).The increase of earthquakes events followed the Maxima of Solar cycle, and also depends on the tectonic plate location. From 1600 until 1645 events increased during the Maxima in some of the tectonic plates as Pacific, Arabian and South America. The earthquakes analyzed during two grand solar minima, the Maunder (1645-1720) and the Dalton (1790-1820) showed a decrease in the number of earth-quakes and the solar activity. It was observed during these minima a significant number of events at specific geological features. After the last minima (Dalton) the earthquakes pattern increased with solar maxima. The calculations showed that events increasing during solar maxima most in the Pacific, South America or Arabian until 1900. Since there were few records during these three centuries we needed addi-tional analysis on modern data. We took the last four solar cycles events (1950-2010) and made similar calculations. The results agreed with the former calculations. It might be that the mecha-nism for the Sun-Earth connection relies on the solar wind speed. In both records (1600-1900) and (1950-2010) the results showed a significant increase in earthquakes events in some of the tectonic plates linked to solar maxima. The So-lar wind energy striking the Earth’s magneto-sphere affects the entire environment because the pressure on the region increases and the magnetosphere shrinks sometimes four Earth’s radii. This sudden compression causes earth-quakes in specific plates. During the times of solar minima the pressure from the solar wind on the earth decreases, then the magnetosphere expands and earthquakes happen in a different pattern according to the geological feature on earth’s surface less frequently. Solar driven events include coronal mass ejections (CME) and coronal holes, which are at a maximum during the descending phase of solar activity. The tectonic are important because there is he-terogeneity in the crust and the tectonic stress depends on each region. The geo-effectiveness of solar wind from a coronal hole only depends on the position of the hole relative to the Earth and for the CMEs an additional factor is their velocity. The influence of these solar events could be detected from electromagnetic varia-tions on the ground prior the earthquakes. The goal in this research was to show the solar events influenced the earthquakes and seis-mologic events following some special display and also how the Sun’s activity played to make earthquakes increase. This paper discussed details of this mechanism, calculations and as-sociated factors.

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Tavares, M. and Azevedo, A. (2011) Influences of Solar Cycles on Earthquakes. Natural Science, 3, 436-443. doi: 10.4236/ns.2011.36060.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Ritz M., (1984) Short communication: A high conductivity anomaly on the West African craton (MALI). Journal of Geophysics, 55, 182-184.
[2] Serrano, I., Zhao, D., Morales, J. and Torcal, F. (2003) Seismic tomography from local crustal earthquakes beneath eastern Rif Mountains of Morocco, Tectonic Physics, 367, 187-201.
[3] Mazzarella, A., Palumbo, A., (1988) Solar geomagnetic and seismic activity, NuovoCimento C, Serie, 1, 353-364.
[4] Han, Y.B., Guo, Z.J., Wu, Jinbing and Ma, L.H. (2004) Possible triggering of solar activity to big earthquakes (Ms ≥ 8) in faults with near west-east strike in China. Science in China Series G Physics, Mechanics and Astronomy, 47, 173-181.
[5] Sobolev, G.A., Shestopalov, I.P. and Kharin, E.P. (1998) Geoeffective solar flashes and seismic activity of the Earth, FizikaZemli (in Russian), 7, 85-90.
[6] Zolotov O.V., Namgaladze A.A., Zkharenkova, I.E, Shagimuratov, I.I., Martynenko, O.V. (2010) Modeling of ionospheric earthquake precursors generated by various electric field sources. Natural Hazards Earth System Sciences, 10, 7-18.
[7] Freund, F.T., (2007) Pre earthquake signals- Part I: Deviatoric stresses turn rocks into a source of electric currents. Natural Hazards and Earth System Sciences, 7, 535-541.
[8] Freund, F.T. (2007) Pre earthquake signals—Part II: Flow of battery currents in the crust. Natural Hazard Earth System Sciences, 7, 543-548.
[9] Hermance, J.F. (1995) Electrical conductivity models of the crust and mantle—Global Earth Physics. A Handbook of Physical Constants, AGU Reference, Copyright 1995.
[10] Biagi, P.F., Piccolo, R., Ermini, A., Martelluci S., Bellecci C., Hayakawa, M., Capozzi, V. and Kingsley, S.P. (2001) Possible earthquakes precursors revealed by LF radio signals. Natural Hazard and Earth System Sciences, 1, 99-104.
[11] Inan, U.S., Piddyachiy, D., Peter, W.B., Sauvaud, J.A. and M-Demeter, P. (2007) Satellite observations of lightning induced precipitation. Geophysical Research Letters, 34, L07013.
[12] Gousheva, M.N., Georgiva, K.Y., Kirov, B.B., Atanssov, D. (2003) On the relation between solar activity and seismicity. Proceedings of International Conference on Recent Advances in Space Technologies, 20-22 November 2003.
[13] Qian, F. Y., Zhao, Y. L. and Lu, J. (1997) Georesistivity precursors to the Tangshan earthquake, Annals of Geophysics, Annals of Geophysics, 40, 251-260.
[14] Fukao, Y., Koyama, T., Obayashi, M, Utada, H., (2004) Trans Pacific temperature field in the mantle transition region from seismic and electromagnetic tomography. Earth and Planetary Science Letters, 217, 425-434.
[15] Bleckia, J.C., Parroth, M., Wronowskia, R., (2010) Plasma turbulence in the ionosphere prior to earthquakes some remarks on the Demeter registrations. Journal of Asian Earth Sciences, 41, 450-458.
[16] Akhoondzadeh, M. et al. (2010) Electron and ion density variations before strong earthquakes. Natural Hazards Earth System Sciences, 10, 7-18. doi:10.5194/nhess-10-7-2010
[17] Mukherjee, S. (2008) Cosmic Influence on the Sun-Earth Environment, Sensors, 8, 7736-7752.
[18] Namgaladze, A.A, Zolotov, O.V., Zakarenkhova, I.E., Shagimuratov, I.I., Martynenko, O.V. (2009) Ionospheric total electron content variations observed before earthquakes: Possible physical mechanism and modeling. Proceedings of MSTU, 12, 308-315.
[19] Fraser-Smith, A.C., Bernardi, A., McGill, P.R, Ladd, M.E., Helliwell, R.A. and Villard, O.G. (1990) Low- Frequency magnetic field measurements near the epicenter of the Ms 7.1 LomaPrieta Earthquake. Geophysics Research Letters, 17, 1465-1468.

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