SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 6 July, 2025 T-index: 90 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 21-25 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 20.6 0.0 9.2 ASSSM MMMMFFFFFF %%%%.... 12.7 9.8 5.8 00 01 22.2 0.0 10.3 SSSS XMMMMMFFFF FF%%%%.... 14.1 11.6 6.4 01 02 22.2 0.0 11.0 ASSS XXMMMMMFFF FF%%%%.... . 14.7 12.7 6.7 02 03 21.7 0.0 11.3 ASSS SXXMMMFFFF F%%%%..... . 14.6 13.3 6.9 03 04 20.5 0.0 11.4 ASSS SXXMMMFFFF %%%%..... 14.0 13.5 6.9 04 05 20.2 0.0 11.2 ASSS SXXMMFFFFF %%%%.... 13.6 13.3 6.8 05 06 19.7 0.0 10.8 ASSS XXMMMFFFF% %%%..... 13.2 12.8 6.5 06 07 19.7 0.0 10.0 ASSSX XMMMMFFFF% %%%...... 13.0 11.8 6.0 07 08 19.3 0.0 8.6 SSSXM MMMMMFFFF% %%%..... 12.9 9.8 5.2 08 09 18.1 0.0 4.8 SMMMMMM MMMMFFFF%% %...... 12.4 3.4 3.2 09 10 14.3 0.0 0.0 XMMMMMMMMM MMFF%%%... ... 10.1 1.9 0.0 10 11 10.6 0.0 0.0 XMMMMMMMMF %%%%..... 7.7 1.9 0.0 11 12 9.2 0.0 0.0 XMMMMMMMF% %%.... 6.7 1.9 0.0 12 13 8.6 0.0 0.0 XMMMMMMF%% %.... 6.2 1.9 0.0 13 14 7.9 0.0 0.0 XMMMMMM%%% .... 5.8 1.9 0.0 14 15 7.4 0.0 0.0 XMMMMMF%%% .... 5.6 1.9 0.0 15 16 7.2 0.0 0.0 XMMMMMF%%% ... 5.6 1.9 0.0 16 17 7.1 0.0 0.0 XMMMMMF%%. ... 5.6 1.9 0.0 17 18 6.7 0.0 0.0 XMMMMMM%%. ... 5.2 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 5.8 0.0 0.0 XMMMMM%%.. .. 4.5 1.9 0.0 21 22 8.4 0.0 0.0 XMMMMMFF%% %... 5.5 1.9 0.0 22 23 15.6 0.0 7.0 ASMMMM FFFFF%%%.. . 9.2 4.8 4.8 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-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000