SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 10 June, 2026 T-index: 75 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 20.1 0.0 9.0 ASSXM MMMMFFFFFF %%%..... 12.7 9.6 5.7 00 01 21.7 0.0 10.1 SSSS XMMMMMFFFF F%%%%..... 14.0 11.4 6.2 01 02 21.8 0.0 10.7 ASSS XXMMMMMFFF F%%%%%.... . 14.5 12.5 6.5 02 03 20.7 0.0 11.0 ASSS XXXMMMFFFF %%%%%..... . 14.1 13.1 6.7 03 04 20.3 0.0 11.1 ASSS SXXMMMFFFF %%%%...... 13.8 13.3 6.7 04 05 19.9 0.0 10.9 ASSS XXXMMMFFF% %%%%...... 13.5 13.1 6.6 05 06 19.8 0.0 10.5 SSSS XXMMMMFFF% %%%%...... 13.4 12.6 6.3 06 07 20.0 0.0 9.7 ASSSX XMMMMFFFF% %%%%...... . 13.1 11.5 5.8 07 08 19.3 0.0 8.4 ASSSXM MMMMMFFFF% %%%....... 12.8 9.6 5.0 08 09 17.0 0.0 4.6 SMMMMMM MMMMFF%%%% %...... 11.7 3.2 3.1 09 10 13.4 0.0 0.0 XMMMMMMMMM MFF%%%%... ... 9.5 1.9 0.0 10 11 9.8 0.0 0.0 XMMMMMMMM% %%%...... 7.2 1.9 0.0 11 12 8.5 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 7.8 0.0 0.0 XMMMMMM%%% ..... 5.8 1.9 0.0 14 15 7.3 0.0 0.0 XMMMMMM%%% .... 5.5 1.9 0.0 15 16 7.2 0.0 0.0 XMMMMMM%%% .... 5.6 1.9 0.0 16 17 7.2 0.0 0.0 XMMMMMM%%% .... 5.6 1.9 0.0 17 18 7.1 0.0 0.0 XMMMMMM%%% .... 5.4 1.9 0.0 18 19 6.9 0.0 0.0 XMMMMMM%%% .... 5.0 1.9 0.0 19 20 6.4 0.0 0.0 XMMMMM%%%. ... 4.6 1.9 0.0 20 21 6.1 0.0 0.0 XMMMMM%%%. ... 4.8 1.9 0.0 21 22 8.5 0.0 0.0 XMMMMMMF%% %... 5.7 1.9 0.0 22 23 15.5 0.0 6.8 ASMMMM MFFFF%%%.. .. 9.4 0.0 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) 10-Jun-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000