SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 15 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 14.1 15.7 9.2 SSSXX BBBBP%%... 8.6 10.4 5.4 00 01 14.3 17.1 9.9 ASSXX XBBBPPP... 8.9 11.4 5.7 01 02 15.1 18.0 10.3 ASSSX XBBBBPPE.. . 9.4 12.0 6.0 02 03 15.7 18.6 10.6 SSSX XXBBBPPP.. .. 9.9 12.4 6.1 03 04 16.4 18.7 10.7 SSSS XXBBBBPP%. ... 10.2 12.5 6.2 04 05 16.8 18.6 10.6 SSSS XXMBBBPP%% .... 10.4 12.4 6.1 05 06 16.7 18.1 10.3 ASSSS XXBBBBPP%% .... 10.3 12.1 6.0 06 07 15.7 17.2 9.9 ASSSX XMBBBPP%%. .... 9.8 11.6 5.8 07 08 14.8 15.9 9.3 SSSSX MMBBP%%%.. .. 9.5 10.6 5.4 08 09 15.0 13.9 8.3 ASSSXM MMBF%%%%.. ... 9.5 9.1 4.9 09 10 14.4 10.5 6.6 ASSMMMM MMFF%%%%.. ... 9.5 6.4 4.0 10 11 13.5 2.5 0.0 XMMMMMMMMM MFF%%%%... .. 9.3 1.6 0.0 11 12 12.3 2.5 0.0 XMMMMMMMMM FF%%%%.... 8.6 1.6 0.0 12 13 11.3 2.5 0.0 XMMMMMMMMF F%%%.... 7.9 1.6 0.0 13 14 11.2 2.5 0.0 XMMMMMMMMF F%%%.... 7.5 1.6 0.0 14 15 11.3 2.5 0.0 XMMMMMMMMF F%%%.... 7.5 1.6 0.0 15 16 11.8 2.5 0.0 XMMMMMMMMF F%%%%.... 7.5 1.6 0.0 16 17 10.6 2.5 0.0 XMMMMMMMFF %%%.... 7.0 1.6 0.0 17 18 9.3 2.5 0.0 XMMMMMMMF% %%.... 6.5 1.6 0.0 18 19 8.2 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%% %.... 6.3 1.6 0.0 21 22 11.4 9.9 6.3 ASSMMMF F%%%%.... 7.4 6.5 3.7 22 23 13.6 13.6 8.2 ASSSMM BBB%%%.... 8.1 9.0 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) 15-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000