SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 26 November, 2025 T-index: 72 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-13 1E 0 1 5 10 15 20 25 30 35 40 2F 22-31 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 16.0 0.0 10.7 SSXX XXFFF%%%%. .. 8.9 12.5 6.4 00 01 17.2 0.0 11.4 ASSX XXXFFFF%%. ... 9.5 13.5 6.8 01 02 18.1 0.0 11.8 SSX XXXXFFFF%% ..... 9.9 14.2 7.1 02 03 18.5 0.0 12.1 SSS XXXXFFFF%% %...... 10.5 14.6 7.2 03 04 18.7 0.0 12.1 SSS XXXXFFFF%% %%...... 10.9 14.7 7.2 04 05 19.3 0.0 12.0 SSS SXXXFFFFF% %%%...... 11.2 14.6 7.1 05 06 18.8 0.0 11.7 ASSS SXXXFFFF%% %%%...... 11.2 14.2 7.0 06 07 17.8 0.0 11.2 ASSS XXXFFFF%%% %%%..... 10.8 13.3 6.7 07 08 16.9 0.0 10.4 SSSS XMMFFF%%%% %...... 10.4 12.0 6.3 08 09 16.6 0.0 9.2 ASSSM MMMFFF%%%% %...... 10.5 10.0 5.7 09 10 15.2 0.0 6.9 ASMMMM MMMFF%%%%% ...... 10.0 5.3 4.6 10 11 14.1 0.0 0.0 XMMMMMMMMM MMFF%%%%%. ..... 9.6 1.8 0.0 11 12 13.1 0.0 0.0 XMMMMMMMMM MFF%%%%%.. ... 8.8 1.8 0.0 12 13 12.4 0.0 0.0 XMMMMMMMMM FF%%%%%... .. 8.1 1.8 0.0 13 14 12.6 0.0 0.0 XMMMMMMMMM FF%%%%%... .. 7.9 1.8 0.0 14 15 13.1 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.0 1.8 0.0 15 16 13.2 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.1 1.8 0.0 16 17 11.8 0.0 0.0 XMMMMMMMMF F%%%%..... 7.5 1.8 0.0 17 18 10.1 0.0 0.0 XMMMMMMMMF %%%%..... 7.3 1.8 0.0 18 19 9.0 0.0 0.0 XMMMMMMM%% %%%...... 7.0 1.8 0.0 19 20 8.7 0.0 0.0 XMMMMMMM%% %%...... 6.7 1.8 0.0 20 21 9.1 0.0 0.0 XMMMMMMMF% %%%...... 7.1 1.8 0.0 21 22 12.3 0.0 7.9 ASSXMM FF%%%%%... .. 8.4 8.5 4.9 22 23 14.2 0.0 9.7 ASSXX MFFF%%%%.. .. 8.6 11.0 5.8 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) 26-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000