SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 2 February, 2026 T-index: 120 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 17.2 0.0 11.5 ASSS XXFFFFF%%% .... 10.4 13.0 7.0 00 01 18.2 0.0 12.3 SSS XXXXFFFF%% %..... 10.8 14.1 7.4 01 02 19.1 0.0 12.8 ASS SXXXFFFFF% %%.... 11.3 14.9 7.7 02 03 20.4 0.0 13.1 ASS SXXXXFFFFF %%%..... 11.8 15.3 7.8 03 04 20.9 0.0 13.1 ASS SXXXXFFFFF %%%%.... 11.9 15.5 7.8 04 05 21.4 0.0 13.0 ASS SSXXXFFFFF F%%%%.... 12.2 15.3 7.7 05 06 20.9 0.0 12.7 ASS SSXXMFFFFF %%%%%.... 12.2 14.9 7.6 06 07 19.8 0.0 12.1 SSS SXXMFFFFF% %%%%..... 11.8 13.9 7.3 07 08 18.8 0.0 11.2 ASSS SXMMFFFF%% %%%..... 11.5 12.5 6.8 08 09 18.0 0.0 9.8 SSSX MMMMFFF%%% %%..... 11.1 10.3 6.1 09 10 17.3 0.0 6.9 ASMMMM MMMFFFF%%% %..... 11.1 0.0 4.8 10 11 16.2 0.0 0.0 XXMMMMMMMM MMMFFF%%%% ..... 10.9 2.1 0.0 11 12 15.4 0.0 0.0 XXMMMMMMMM MMFFF%%%%. .... 10.4 2.1 0.0 12 13 14.9 0.0 0.0 XXMMMMMMMM MMFF%%%%%. ... 10.0 2.1 0.0 13 14 14.4 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.1 2.1 0.0 14 15 14.7 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.0 2.1 0.0 15 16 14.6 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.0 2.1 0.0 16 17 13.8 0.0 0.0 XXMMMMMMMM FFF%%%%... . 8.7 2.1 0.0 17 18 12.0 0.0 0.0 XXMMMMMMMF F%%%%.... 7.9 2.1 0.0 18 19 11.0 0.0 0.0 XXMMMMMMMF %%%%.... 7.2 2.1 0.0 19 20 9.7 0.0 0.0 XXMMMMMMF% %%%... 6.6 2.1 0.0 20 21 9.7 0.0 0.0 XXMMMMMMF% %%%... 6.4 2.1 0.0 21 22 12.8 0.0 8.3 SSXMM FF%%%%.... 8.0 8.4 5.2 22 23 16.2 0.0 10.4 SSSX XFFFFF%%%. ... 9.7 11.3 6.3 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) 2-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000