SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 25 January, 2026 T-index: 100 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 16.5 0.0 11.2 ASSX XXFFFF%%%. .. 9.5 12.8 6.7 00 01 17.8 0.0 11.9 SSX XXXFFFF%%% .... 9.9 13.9 7.2 01 02 18.6 0.0 12.4 SSS XXXXFFFF%% %.... 10.4 14.6 7.4 02 03 19.1 0.0 12.7 ASS XXXXFFFFF% %%..... 11.0 15.0 7.6 03 04 19.4 0.0 12.7 ASS SXXXXFFFF% %%%.... 11.2 15.2 7.6 04 05 20.0 0.0 12.6 ASS SXXXXFFFF% %%%..... 11.5 15.1 7.5 05 06 19.6 0.0 12.3 SSS SXXXFFFFF% %%%%..... 11.5 14.6 7.3 06 07 18.6 0.0 11.7 ASSS SXXMFFFF%% %%%..... 11.1 13.7 7.0 07 08 17.7 0.0 10.9 ASSS XXMFFFF%%% %%..... 10.8 12.3 6.6 08 09 16.9 0.0 9.5 ASSSX MMMFFF%%%% %..... 10.4 10.2 5.9 09 10 15.9 0.0 7.0 ASMMMM MMMFF%%%%% ..... 10.3 4.8 4.8 10 11 14.9 0.0 0.0 XMMMMMMMMM MMFF%%%%%. .... 10.0 2.0 0.0 11 12 14.2 0.0 0.0 XMMMMMMMMM MMFF%%%%.. ... 9.6 2.0 0.0 12 13 13.8 0.0 0.0 XMMMMMMMMM MFF%%%%%.. .. 9.2 2.0 0.0 13 14 13.5 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.6 2.0 0.0 14 15 13.7 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.5 2.0 0.0 15 16 13.6 0.0 0.0 XMMMMMMMMM FFF%%%%... .. 8.4 2.0 0.0 16 17 12.9 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.2 2.0 0.0 17 18 11.0 0.0 0.0 XMMMMMMMMF %%%%..... 7.5 2.0 0.0 18 19 9.9 0.0 0.0 XMMMMMMMF% %%%%.... 7.1 2.0 0.0 19 20 8.6 0.0 0.0 XMMMMMMM%% %%.... 6.5 2.0 0.0 20 21 8.8 0.0 0.0 XMMMMMMF%% %%.... 6.4 2.0 0.0 21 22 11.8 0.0 8.2 SSXMF F%%%%.... 7.9 8.5 5.1 22 23 14.7 0.0 10.1 SSXX XFFF%%%%.. . 9.0 11.2 6.1 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) 25-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000