SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 19 November, 2025 T-index: 115 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-22 1E 2 1 5 10 15 20 25 30 35 40 2F 29-42 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 14.6 16.0 9.4 ASSXX MBBBPP%... . 9.0 10.6 5.5 00 01 14.6 17.4 10.1 ASSSX XBBBPPP... . 9.3 11.5 5.9 01 02 15.3 18.3 10.6 SSSX XXBBBPPE.. . 9.8 12.2 6.2 02 03 16.0 18.8 10.8 SSSS XXBBBPPP.. .. 10.2 12.5 6.3 03 04 16.6 19.0 10.9 SSSS XXBBBBPPP. ... 10.5 12.7 6.3 04 05 17.0 18.9 10.9 SSSS XXMBBBPP%% ... 10.7 12.6 6.3 05 06 16.7 18.4 10.6 SSSS XXMBBBPP%% .... 10.5 12.3 6.2 06 07 15.7 17.5 10.2 ASSSS XMBBBPP%%. ... 10.1 11.7 5.9 07 08 14.8 16.2 9.5 ASSSX MMBBPP%%.. .. 9.7 10.8 5.6 08 09 15.1 14.2 8.5 ASSSXM MMBBF%%%%. .. 9.8 9.3 5.0 09 10 14.6 10.8 6.8 SSMMMM MMFF%%%%.. .. 9.8 6.6 4.2 10 11 14.0 2.5 0.0 XMMMMMMMMM MFF%%%%... . 9.7 1.7 0.0 11 12 12.9 2.5 0.0 XMMMMMMMMM MF%%%%.... 9.0 1.7 0.0 12 13 12.1 2.5 0.0 XMMMMMMMMM FF%%%... 8.4 1.7 0.0 13 14 11.8 2.5 0.0 XMMMMMMMMF F%%%%... 8.0 1.7 0.0 14 15 11.9 2.5 0.0 XMMMMMMMMF F%%%%... 7.9 1.7 0.0 15 16 12.4 2.5 0.0 XMMMMMMMMF FF%%%.... 7.9 1.7 0.0 16 17 11.2 2.5 0.0 XMMMMMMMMF F%%%... 7.4 1.7 0.0 17 18 9.8 2.5 0.0 XMMMMMMMF% %%.... 6.7 1.7 0.0 18 19 8.9 2.5 0.0 XMMMMMMM%% %%... 6.2 1.7 0.0 19 20 8.8 2.5 0.0 XMMMMMMF%% %.... 6.0 1.7 0.0 20 21 8.9 2.5 0.0 XMMMMMMM%% %%... 6.3 1.7 0.0 21 22 11.9 10.3 6.5 ASSMMMB F%%%%... 7.6 6.8 3.8 22 23 14.2 13.9 8.4 ASSSXM BBBF%%%... 8.5 9.2 4.9 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) 19-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000