SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 4 January, 2026 T-index: 75 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-14 1E 0 1 5 10 15 20 25 30 35 40 2F 22-32 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 16.1 0.0 10.8 ASXX XXFFFF%... . 8.8 12.6 6.5 00 01 17.3 0.0 11.5 ASSX XXXFFFF%%. .. 9.5 13.6 6.9 01 02 18.1 0.0 11.9 SSX XXXXFFFF%. .... 10.0 14.3 7.1 02 03 18.6 0.0 12.1 SSS XXXXFFFF%% %..... 10.3 14.7 7.2 03 04 18.7 0.0 12.2 SSS XXXXFFFF%% %%..... 10.5 14.8 7.2 04 05 18.7 0.0 12.1 SSS XXXXFFFF%% %%%..... 10.9 14.7 7.2 05 06 18.4 0.0 11.8 ASSS XXXXFFFF%% %%%...... 10.8 14.2 7.0 06 07 17.5 0.0 11.2 ASSS XXXFFFF%%% %%...... 10.4 13.4 6.8 07 08 16.7 0.0 10.5 SSSS XXMFFF%%%% %...... 10.2 12.1 6.4 08 09 15.9 0.0 9.3 ASSSX MMMFF%%%%% ..... 10.1 10.1 5.8 09 10 14.5 0.0 7.1 ASSMMM MMFF%%%%%. ..... 9.5 5.9 4.8 10 11 13.4 0.0 0.0 XMMMMMMMMM MMF%%%%%.. .... 9.1 1.9 0.0 11 12 12.8 0.0 0.0 XMMMMMMMMM MF%%%%%... ... 8.7 1.9 0.0 12 13 12.5 0.0 0.0 XMMMMMMMMM MF%%%%%... .. 8.2 1.9 0.0 13 14 12.7 0.0 0.0 XMMMMMMMMM FF%%%%%... .. 8.0 1.9 0.0 14 15 13.1 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.2 1.9 0.0 15 16 12.8 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.0 1.9 0.0 16 17 12.0 0.0 0.0 XMMMMMMMMF F%%%%..... 7.6 1.9 0.0 17 18 10.0 0.0 0.0 XMMMMMMMM% %%%%..... 7.3 1.9 0.0 18 19 8.8 0.0 0.0 XMMMMMMM%% %%%...... 6.8 1.9 0.0 19 20 7.8 0.0 0.0 XMMMMMM%%% %..... 6.1 1.9 0.0 20 21 8.1 0.0 0.0 XMMMMMMF%% %%..... 6.4 1.9 0.0 21 22 11.5 0.0 8.1 ASSXMF F%%%%..... 7.9 8.7 4.9 22 23 14.3 0.0 9.8 ASSXX XFFF%%%... 8.2 11.1 5.9 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) 4-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000