SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 9 July, 2026 T-index: 60 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 18.4 0.0 8.8 ASSXM MMMFFFFF%% %.... 11.5 9.5 5.5 00 01 19.6 0.0 9.8 SSSX XMMMFFFFF% %%%.... 12.6 11.3 6.1 01 02 19.1 0.0 10.4 SSSS XXMMMFFFF% %%%..... 12.7 12.3 6.4 02 03 18.3 0.0 10.7 ASSS XXMMMFFF%% %%...... 12.6 12.9 6.5 03 04 17.3 0.0 10.8 ASSS XXXMFFF%%% %..... 12.2 13.1 6.5 04 05 17.2 0.0 10.7 SSSS XXMMFFF%%% %..... 11.9 12.9 6.4 05 06 16.9 0.0 10.2 SSSS XXMMFF%%%% %..... 11.6 12.4 6.1 06 07 16.9 0.0 9.5 ASSSX XMMMFF%%%% %..... 11.5 11.4 5.7 07 08 16.5 0.0 8.2 ASSSXM MMMMFF%%%% ...... 11.4 9.5 4.9 08 09 15.3 0.0 4.7 SMMMMMM MMMFF%%%%. .... 10.7 3.6 3.1 09 10 11.8 0.0 0.0 XMMMMMMMMM F%%%%..... 8.6 1.8 0.0 10 11 9.0 0.0 0.0 XMMMMMMM%% %%..... 6.7 1.8 0.0 11 12 8.0 0.0 0.0 XMMMMMM%%% ..... 6.0 1.8 0.0 12 13 7.6 0.0 0.0 XMMMMMM%%% .... 5.6 1.8 0.0 13 14 7.3 0.0 0.0 XMMMMMF%%% .... 5.4 1.8 0.0 14 15 7.0 0.0 0.0 XMMMMM%%%. ... 5.4 1.8 0.0 15 16 7.0 0.0 0.0 XMMMMM%%%. ... 5.4 1.8 0.0 16 17 6.8 0.0 0.0 XMMMMM%%%. ... 5.4 1.8 0.0 17 18 6.4 0.0 0.0 XMMMMM%%%. ... 5.1 1.8 0.0 18 19 6.0 0.0 0.0 XMMMMM%%%. ... 4.5 1.8 0.0 19 20 5.5 0.0 0.0 XMMMM%%%.. .. 4.0 1.8 0.0 20 21 5.4 0.0 0.0 XMMMM%%%.. .. 4.2 1.8 0.0 21 22 7.8 0.0 0.0 XMMMMMF%%% ... 5.4 1.8 0.0 22 23 14.2 0.0 6.7 ASMMMF FFFF%%.... 8.5 4.8 4.6 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) 9-Jul-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000