The Mansurov effect: Statistical significance and the role of autocorrelation Jone Edvartsen, Ville Maliniemi, Hilde Nesse Tyssøy, Timo Asikainen and Spencer Hatch J. Space Weather Space Clim., 12 (2022) 11 Published online: 08 April 2022 DOI: 10.1051/swsc/2022008