The sun as a significant agent provoking earthquakes G. Anagnostopoulos, I. Spyroglou, A. Rigas, P. Preka-Papadema, H. Mavromichalaki and I. Kiosses Eur. Phys. J. Special Topics, 230 1 (2021) 287-333 Published online: 19 January 2021 DOI: 10.1140/epjst/e2020-000266-2