Han, Y. Guo, Z., Wu, J. and Ma, L. (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, 472, 173-181.
 Gousheva, M.N., Georgieva, K.Y., Kirov, B.B. and Antanasov, D. (2003) On the relation between solar activity and seismicity. IEEE Proceedings of International Conference on Recent Advances in Space Technologies, Istanbul, 11-13 June 2003, 236-240.
 Odintsov, S., Boyarchuk, K., Georgieva, B., Kirov, B. and Antanasov, D. (2006) Long-period trends in global seismic and geomagnetic activity and their relation to solar activity. Physics and Chemistry of the Earth, Parts A/B/C 31.1-3, 88-93.
 Solar Influences Data Center (SIDC) (2012) International sunspot number. http://sidc.oma.be/
 NASA (2012) Coronal mass ejections. http://helios.gsfc.nasa.gov/cme.html
 Dandouras, I.S., Rème, H., Cao, J. and Escoubet, P. (2009) Magnetosphere response to the 2005 and 2006 extreme solar events as observed by the Cluster and Double Star spacecraft. Advances in Space Research, 43, 618-623. doi:10.1016/j.asr.2008.10.015
 Northern California Earthquake Data Center (NCEDC) (2012) ANSS worldwide earthquake catalogue. http://www.ncedc.org/anss/
 S?rensen, B.E. (2005) Cointegration. http://www.uh.edu/~bsorense/coint.pdf
 British Geological Survey (BGS) (2012) The Earth’s magnetic field: An overview. http://www.geomag.bgs.ac.uk/education/earthmag.html