SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 6 July, 2026 T-index: 80 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-9 1E 0 1 5 10 15 20 25 30 35 40 2F 21-24 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 19.7 0.0 9.1 ASSSM MMMMFFFFF% %%%.... 12.3 9.7 5.7 00 01 21.1 0.0 10.2 SSSS XMMMMFFFFF F%%%%.... 13.5 11.5 6.3 01 02 21.1 0.0 10.8 ASSS XXMMMMFFFF F%%%%..... 14.0 12.6 6.6 02 03 20.7 0.0 11.1 ASSS SXXMMMFFFF %%%%...... 14.0 13.2 6.7 03 04 19.6 0.0 11.2 ASSS SXXMMFFFF% %%%..... 13.5 13.3 6.8 04 05 19.3 0.0 11.0 ASSS XXXMMFFFF% %%%..... 13.1 13.2 6.6 05 06 18.8 0.0 10.6 SSSS XXMMMFFF%% %%...... 12.8 12.6 6.4 06 07 18.9 0.0 9.8 ASSSX XMMMMFFF%% %%....... 12.6 11.6 5.9 07 08 18.4 0.0 8.5 SSSXM MMMMMFFF%% %%...... 12.5 9.7 5.1 08 09 17.1 0.0 4.7 SMMMMMM MMMMFFF%%% ...... 11.8 3.4 3.2 09 10 13.4 0.0 0.0 XMMMMMMMMM MFF%%%%... .. 9.6 1.9 0.0 10 11 10.0 0.0 0.0 XMMMMMMMM% %%%...... 7.4 1.9 0.0 11 12 8.7 0.0 0.0 XMMMMMMM%% %..... 6.4 1.9 0.0 12 13 8.2 0.0 0.0 XMMMMMMF%% %.... 6.0 1.9 0.0 13 14 7.6 0.0 0.0 XMMMMMM%%% .... 5.6 1.9 0.0 14 15 7.1 0.0 0.0 XMMMMMF%%% ... 5.5 1.9 0.0 15 16 7.0 0.0 0.0 XMMMMM%%%. ... 5.5 1.9 0.0 16 17 6.9 0.0 0.0 XMMMMM%%%. ... 5.5 1.9 0.0 17 18 6.6 0.0 0.0 XMMMMMM%%. ... 5.1 1.9 0.0 18 19 6.3 0.0 0.0 XMMMMM%%%. ... 4.7 1.9 0.0 19 20 5.8 0.0 0.0 XMMMM%%%.. .. 4.2 1.9 0.0 20 21 5.7 0.0 0.0 XMMMMM%%.. .. 4.4 1.9 0.0 21 22 8.2 0.0 0.0 XMMMMMFF%% .... 5.4 1.9 0.0 22 23 14.9 0.0 6.9 ASMMMM FFFF%%%... . 8.9 4.8 4.7 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) 6-Jul-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000