Fig. 2From: Systemic lupus Erythematosus and geomagnetic disturbances: a time series analysis27-day PGA average time series analysis. a ACF of detrended 27-day PGA average. b ACF of detrended and deseasonalized 27-day PGA average. c ACF of ARMA(1,1) residuals. d Q-Q plot of ARMA(1,1) residualsBack to article page