SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 8 November, 2025 T-index: 65 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-19 1E 2 1 5 10 15 20 25 30 35 40 2F 29-39 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 13.0 15.0 8.6 ASSXXM BBPPP%... 8.0 9.9 5.0 00 01 13.7 16.4 9.3 SSSXX BBBPPP... 8.2 10.9 5.4 01 02 14.5 17.3 9.7 ASSXX XBBBPPP... 8.8 11.5 5.6 02 03 15.1 17.8 9.9 ASSSX XBBBBPP%.. .. 9.4 11.9 5.8 03 04 15.8 18.0 10.0 ASSSX XMBBBPPP%. ... 9.7 12.0 5.8 04 05 16.1 17.9 9.9 ASSSX XMBBBBP%%. .... 9.9 11.9 5.8 05 06 15.7 17.4 9.7 ASSSX XMBBBPP%%. .... 9.8 11.6 5.6 06 07 15.1 16.5 9.3 SSSSX XMBBBP%%%. ... 9.4 11.1 5.4 07 08 14.3 15.2 8.7 SSSXX MBBBP%%%.. .. 9.1 10.1 5.1 08 09 14.4 13.2 7.7 ASSXMM MBBF%%%%.. .. 9.1 8.7 4.6 09 10 13.1 9.8 6.0 ASMMMMM MFF%%%%... .. 8.8 5.9 3.7 10 11 11.8 2.2 0.0 XMMMMMMMMM M%%%%%.... .. 8.2 1.5 0.0 11 12 10.6 2.2 0.0 XMMMMMMMMM %%%%%.... 7.5 1.5 0.0 12 13 9.7 2.2 0.0 XMMMMMMMM% %%%..... 6.8 1.5 0.0 13 14 9.7 2.2 0.0 XMMMMMMMF% %%%.... 6.5 1.5 0.0 14 15 10.0 2.2 0.0 XMMMMMMMF% %%%.... 6.5 1.5 0.0 15 16 10.3 2.2 0.0 XMMMMMMMFF %%%.... 6.5 1.5 0.0 16 17 9.3 2.2 0.0 XMMMMMMFF% %%.... 6.1 1.5 0.0 17 18 8.0 2.2 0.0 XMMMMMM%%% %.... 5.9 1.5 0.0 18 19 7.0 2.2 0.0 XMMMMM%%%% .... 5.4 1.5 0.0 19 20 6.8 2.2 0.0 XMMMMM%%%. .... 5.3 1.5 0.0 20 21 7.1 2.2 0.0 XMMMMMF%%% .... 5.5 1.5 0.0 21 22 10.2 9.2 5.7 SSMMMBF %%%.... 6.9 6.0 3.4 22 23 12.4 13.0 7.6 SSSXMB BBP%%... 7.5 8.6 4.4 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) 8-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000