Is there any connection between solar activity and earthquakes?

1Vasylieva, IE
1Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kyiv, Ukraine
Space Sci. & Technol. 2020, 26 ;(5):090-102
Publication Language: Ukrainian
A possible relationship between solar activity and the seismic activity of the Earth is considered. We analyzed the frequency of occurrence of earthquakes of various magnitudes with the Fourier transform: for M ≥ 7 over the period 1900—2019 and for 2.5 ≤ M ≤ 7 over the period 1973–2019. The average annual, monthly, and daily values of the solar-terrestrial variables, the number of earthquakes with intensities that fall within the specified boundaries are calculated. The epoch overlapping method was used to analyze the possible relationship between the Wolf numbers and the number of earthquakes at the corresponding moment in the cycle. 4 periods of each solar cycle were identified: the phase of ascending, maximum, descending, and minimum.  
            Earthquakes over the entire globe and in the regions of extension and compression of the earth's crust were analyzed for each phase. No statistically significant dependencies between solar-terrestrial variables and earthquake initiation were found for all time intervals and all selected earthquake magnitudes. An interesting fact was established concerning the change in the number of earthquakes at different periods of the day. The number of earthquakes in the nighttime appreciably increases (by ~ 10 %) compared to the daytime. A slight increase in the number of earthquakes after local noon was also detected. We could not confirm the existence of a direct connection between solar activity and the seismic activity of the Earth, but we cannot also claim that such a connection does not exist.
Keywords: cyclicity, earthquakes, solar activity, solar flares, Wolf numbers
1. Anagnostopoulos G., Papandreou A. (2012). Space conditions during a month of a sequence of six M > 6.8 earthquakes ending with the tsunami of 26 December 2004. Natur. Hazards and Earth Syst. Sci. Discuss., 12, 1551—1559.
2. Fishkova L. M., Gokhberg M. B., Pilipenko V. A. (1985). Relationship between night airglow and seismic activity. Ann. Geophys., 3(6), 689—694.
3. Gole P. K., Midya S. K., Panda P., Nandi A.(2018). Intensity variations of O I 557.7 nm and O I 630.0 nm lines before M5.0 and greater earthquakes in Tokyo region, Japan, in 1979 to 1990. Atmos. and Oceanic Opt., 31(6), 670—677.
4. Gross R. S., Chao B. (2006). The rotational and gravitational signature of the December 26, 2004 Sumatran earthquake. Surv. Geophys., 27, 615—632.
5. Hagen M., Azevedo A. (2017). Possible connections between X-solar flares and worldwide variation in seismicity enhancement. Natur. Sci., 9(12), 457—476.
6. Han Y., Guo Z., Wu J., Ma L. (2004). Possible triggering of solar activity to big earthquakes (Ms 8) in faults with near westeast strike in China. Sci. in China. Ser. G Phys., Mech. and Astron., 47(2), 173—181.
7. Huzaimy J. M., Yumoto K. (2011). Possible correlation between solar activity and global seismicity. Proc. 2011 IEEE Int. Conf. Space Sci. Comm. Penang Malaysia, 138—141.
8. Jusoh M. H. (2013). Solar Activity and Seismicity.— A dissertation submitted by the Department of Earth and Planetary Sciences Graduate School of Science in partial fulfillment of the requirements for the degree Doctor of Science Kyushu University Fukuoka, Japan. 90 p.
9. Khain V. E., Khalilov E. N. (2007/2008). About Possible influence of solar activity upon seismic and volcanic activities: long-term forecast. Trans. Int. Acad. Sci. H&E., SWB, 3, 217— 256.
10. Kızılok Kara E., Durukan K. (2017). The statistical analysis of the earthquake hazard for Turkey by generalized linear models. Gazi Univ. J. Sci., 30(4), 584—597.
11. Larocca P. A. (2016). Application of the Cross Wavelet Transform to Solar Activity and Major Earthquakes Occurred in Chile. Int. J. Geosci., 7(11), 1310—1317.
12. Lin C.-H., Yeh Y. H., Chen Y.-I., Zheng B., Chen K. J. (2003). Earthquake clustering relative to lunar phases in Taiwan. Terrest. Atmos. and Oceanic Sci., 14(3), 1—10.
13. Liritzis I., Tsapanos T. M. (1993). Probable Evidence for Periodicities in Global Seismic Energy Release. Earth, Moon, and Planets., 60(2), 93—108.
14. Lomnitz C. (1964). Estimation problems in earthquake series. Tectonophys., 1(2), 193—203.
15. Love J. J., Thomas J. N. (2013). Insignificant solar-terrestrial triggering of earthquakes. Geophys. Res. Lett., 40(6), 1165—1170.
16. McMinn D. (2012). 9/56 year cycle: 18th & 19th century world earthquakes. New Concepts in Global Tectonics. Newsletter, 65, 15—26.
17. Meeus J., Gribbin J. (1976). Sunspots and earthquakes. Physics Today, 29(6), 11—12.
18. Michael M. O. (1978). Fluctuations in yearly numbers of M  8.0 earthquakes, 1900—1975. New Zealand J. Geol. and Geophys., 21(1), 135—136.
19. Midya S. K., Gole P. K. (2013). Trend of major earthquakes during the period 1900—2011 and its association with some solar and geomagnetic parameters. Indian J. Phys., 88(1), 1—4.
20. Midya S. K., Panda P. (2013). Study of major earthquakes (Magnitude 6 Richter Scale) with Cp index during the period 2001—2007. Pacif. J. Sci. and Technol., 14(1), 586—592
21. Nikouravan B. (2012). Do solar activities cause local earthquakes? (New Zealand). Int. J. Fundamental Phys. Sci., 2, 20—23.
22. Odintsov S., Boyarchuk K., Georgieva K., Kirov B., Atanasov D. (2006). Long-period trends in global seismic and geomagnetic activity and their relation to solar activity. Phys. Chem. Earth, 31, 88—93.
23. Police countermeasures and damage situation associated with 2011Tohoku district — off the Pacific Ocean Earthquake June 10, 2019. URL:, (Last accessed: 24.12.2019).
24. Rajesh R., Tiwari R. K. (2014). Brief communication: Correlation of global earthquake rates with temperature and sunspot cycle. Natur. Hazards and Earth Syst. Sci. Discuss., 2(4), 2851—2867.
25. Rao N. M., Kaila K. L. (1986). Model of earthquake-energy periodicity in the Alpide-Himalayan seismotectonic belt. Tectonophys., 124(3), 261—270.
26. Ruzhin Yu., Novikov V. (2018). The response of global seismicity to solar flares of September, 2017. Int. J. Electron. Appl. Res., 5(2), 1—10.
27. Shlien S., Toksöz M. N. (1970). A clustering model for earthquake occurrences. Bull. Seismol. Soc. Amer., 60(6), 765—1787.
28. Simpson J. F. (1967—1968). Solar activity as a triggering mechanism for earthquakes. Earth Planet. Sci. Lett., 3, 417—425.
29. Sukma I., Abidin Z. Z. (2017). Study of seismic activity during the ascending and descending phases of solar activity. Indian J. Phys., 91(6), 595—606.
30. Tavares M., Azevedo A. (2011). Influences of solar cycles on earthquakes. Natur. Sci., 3(6), 436—443.
31. Vere-Jones D., Davies R. B. (1966). A statistical survey of earthquakes in the main seismic region of New Zealand. New Zealand J. Geol. and Geophys., 9(3), 251—284.
32. Wallemacq P., Below R., McLean D. (2018). UNISDR and CRED report: Economic Losses, Poverty & Disasters (1998—2017). Centre for Research on the Epidemiology of Disasters. URL: (Last accessed: 24.12.2019).
33. Xingxin D. (1997). Wavelets Data Based Analysis of Dynamic Seismicity Period. Earthquake, 17, 257—264.
34. Yesugey S. C. (2009). Comparative evaluation of the influencing effects of geomagnetic storms on earthquakes in the Anatolian Peninsula. Earth Sci. Res. J., 13, 82—89.
35. Zhang G.-Q. (1998). Relationship between global seismicity and solar activities. Acta Seismol. Sinica, 11, 495—500.
36. Zhang Z. X., Li X. The sinusoidal periodicity nature for M  5 global earthquakes. 2016. arXiv:1607.05391v1 [physics.geo-ph] 19 Jul 2016. URL: (Last accessed: 24.12.2019).