SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 23 November, 2025 T-index: 100 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-21 1E 2 1 5 10 15 20 25 30 35 40 2F 29-41 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 13.8 15.8 9.2 SSSXX BBBPP%.... 8.5 10.5 5.4 00 01 14.3 17.1 9.9 ASSXX XBBBPPP... 8.8 11.4 5.8 01 02 15.1 18.0 10.3 ASSSX XBBBBPPE.. . 9.2 12.0 6.0 02 03 15.5 18.6 10.6 SSSX XXBBBPPP.. .. 9.7 12.4 6.1 03 04 16.2 18.8 10.7 SSSX XXBBBBPP%. ... 10.0 12.5 6.2 04 05 16.6 18.6 10.6 SSSS XXBBBBPP%. ... 10.3 12.4 6.1 05 06 16.4 18.1 10.4 ASSSS XXBBBBPP%% .... 10.1 12.1 6.0 06 07 15.6 17.3 9.9 ASSSX XMBBBPP%%. .... 9.7 11.6 5.8 07 08 14.8 15.9 9.3 ASSSX MMBBP%%%.. .. 9.4 10.6 5.5 08 09 14.8 14.0 8.3 ASSSXM MMBB%%%%.. .. 9.4 9.2 4.9 09 10 14.0 10.8 6.7 SSMMMM MFF%%%%%.. .. 9.3 6.6 4.1 10 11 13.3 2.5 0.0 XMMMMMMMMM MFF%%%%... .. 9.2 1.6 0.0 11 12 12.3 2.5 0.0 XMMMMMMMMM FF%%%%.... 8.6 1.6 0.0 12 13 11.5 2.5 0.0 XMMMMMMMMM F%%%%.... 7.9 1.6 0.0 13 14 11.4 2.5 0.0 XMMMMMMMMF F%%%.... 7.6 1.6 0.0 14 15 11.6 2.5 0.0 XMMMMMMMMF F%%%.... 7.5 1.6 0.0 15 16 11.9 2.5 0.0 XMMMMMMMMF F%%%%.... 7.5 1.6 0.0 16 17 10.8 2.5 0.0 XMMMMMMMFF %%%.... 7.0 1.6 0.0 17 18 9.5 2.5 0.0 XMMMMMMMF% %%.... 6.6 1.6 0.0 18 19 8.5 2.5 0.0 XMMMMMMF%% %.... 6.2 1.6 0.0 19 20 8.2 2.5 0.0 XMMMMMMF%% %.... 6.0 1.6 0.0 20 21 8.3 2.5 0.0 XMMMMMMF%% %.... 6.2 1.6 0.0 21 22 11.1 10.3 6.4 ASSMMMB F%%%.... 7.3 6.8 3.7 22 23 13.3 13.7 8.2 ASSXXM BBB%%%... 8.0 9.1 4.8 23 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT =============================================================================== |. USABLE LESS THAN 50% OF DAYS |% USABLE 50% TO 90% OF DAYS | |B BOTH E and F MODES 90% OF DAYS |M MIXED FIRST AND SECOND F MODES | |F FIRST F MODE ONLY |E E-LAYER PROPAGATION |P 90% E and 50-90% F | |S SECOND MODES ONLY |A HIGH ABSORPTION |X COMPLEX MODES | (c) 23-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000