The Ap index tells you what HF radio wave propagation conditions were yesterday. Yesterday's Ap ranged between 80 and 9 which was at major geomagnetic storming conditions to unsettled geomagnetic conditions. The Kp index is for what's going on today. Since 0000 UTC the 3 hour interval Kp numbers have been 5 5 3 4 3 which is at minor geomagnetic storming conditions to unsettled geomagnetic conditions. I do allot of SWL'ing both DX and program listening of shortwave broadcast radio stations. At this time of the day 1615 UTC in central Florida I like to listen to radio stations on 15 meters. But the band is totally dead due to ongoing geomagnetic storming. I also listen on 16 meters and it's nearly as dead.