SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 7 February, 2026 T-index: 125 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 18.0 0.0 11.6 ASSS XXMFFFF%%% %.... 10.8 13.0 7.0 00 01 19.1 0.0 12.4 SSS SXXXFFFFF% %%..... 11.3 14.2 7.4 01 02 19.6 0.0 12.9 ASS SXXXFFFFF% %%%.... 11.5 14.9 7.7 02 03 21.0 0.0 13.2 ASS SXXXXFFFFF %%%%.... 12.0 15.4 7.9 03 04 21.3 0.0 13.2 ASS SSXXXFFFFF F%%%.... 12.2 15.5 7.9 04 05 21.8 0.0 13.1 ASS SSXXXFFFFF F%%%%.... 12.3 15.4 7.8 05 06 21.3 0.0 12.7 ASS SSXXMFFFFF F%%%%..... 12.5 14.9 7.6 06 07 20.4 0.0 12.1 SSS SSXMMFFFFF %%%%%..... 12.1 14.0 7.3 07 08 19.2 0.0 11.2 ASSS SXMMFFFFF% %%%..... 11.8 12.5 6.8 08 09 18.3 0.0 9.8 SSSX MMMMFFFF%% %%..... 11.3 10.2 6.1 09 10 17.7 0.0 6.7 ASMMMM MMMMFFF%%% %%.... 11.5 0.0 4.7 10 11 16.8 0.0 0.0 XXMMMMMMMM MMMFFF%%%% %.... 11.3 2.1 0.0 11 12 15.9 0.0 0.0 XXMMMMMMMM MMFFF%%%%% .... 10.6 2.1 0.0 12 13 15.4 0.0 0.0 XXMMMMMMMM MMFFF%%%%. ... 10.2 2.1 0.0 13 14 14.5 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.2 2.1 0.0 14 15 14.8 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.0 2.1 0.0 15 16 14.7 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.0 2.1 0.0 16 17 13.9 0.0 0.0 XXMMMMMMMM FFF%%%%... . 8.8 2.1 0.0 17 18 12.3 0.0 0.0 XXMMMMMMMM FF%%%.... 7.9 2.1 0.0 18 19 11.2 0.0 0.0 XXMMMMMMMF F%%%.... 7.2 2.1 0.0 19 20 9.9 0.0 0.0 XXMMMMMMF% %%%... 6.5 2.1 0.0 20 21 10.0 0.0 0.0 XXMMMMMMF% %%%... 6.3 2.1 0.0 21 22 13.1 0.0 8.2 SSXMM FFF%%%.... 8.0 8.2 5.1 22 23 16.8 0.0 10.4 SSSX XMFFFF%%%% ... 10.0 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) 7-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000