Three-hour forecast of K _p using LSTM classifier & Deep Gaussian Process Regression (Deep GPR) for a solar maximum period (1st July–31st August, 2004). Panels: (a) prediction from the model using OMNI solar wind data and (b) prediction from the model using OMNI solar wind data and GOES solar flux data. Blue and black dots in panels (a) and (b) are mean predictions and red dots show observed K _p , respectively. Light blue and black shaded regions in panels (a) and (b) respectively show 95% confidence interval. RMSE (ε) and MAE () are mentioned inside each panel.