SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 12 March, 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 7-11 1E 0 1 5 10 15 20 25 30 35 40 2F 22-28 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 20.2 0.0 10.8 ASSS XXMMMFFFFF %%%.... 12.8 12.1 6.6 00 01 22.0 0.0 11.6 ASSS SXXMMMFFFF F%%%%.... 13.7 13.4 7.0 01 02 22.9 0.0 12.2 SSS SSXXMMFFFF FF%%%%.... 13.8 14.3 7.3 02 03 23.9 0.0 12.5 ASS SSXXMMFFFF FFF%%%.... . 13.9 14.7 7.5 03 04 24.1 0.0 12.5 ASS SSXXMMFFFF FFFF%%%... . 14.0 14.9 7.5 04 05 24.3 0.0 12.4 SSS SSXXMMFFFF FFFF%%%... . 14.2 14.7 7.4 05 06 23.9 0.0 12.0 SSS SXXXMMFFFF FFF%%%%... . 14.1 14.3 7.1 06 07 23.0 0.0 11.4 ASSS SXXMMMFFFF FF%%%%%... . 13.6 13.3 6.8 07 08 22.9 0.0 10.4 SSSS XMMMMMFFFF FF%%%%%... . 13.6 11.8 6.3 08 09 21.7 0.0 8.7 SSSXM MMMMMMFFFF F%%%%.... 13.4 9.1 5.4 09 10 19.1 0.0 0.0 MMMMMMMMMM MMMMMFFFF% %%%...... 12.1 0.0 3.3 10 11 16.2 0.0 0.0 XMMMMMMMMM MMMFFF%%%% %...... 11.0 2.0 0.0 11 12 14.2 0.0 0.0 XMMMMMMMMM MMFF%%%%.. .... 9.6 2.0 0.0 12 13 13.5 0.0 0.0 XMMMMMMMMM MFF%%%%... ... 8.9 2.0 0.0 13 14 12.5 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.2 2.0 0.0 14 15 12.5 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.1 2.0 0.0 15 16 12.3 0.0 0.0 XMMMMMMMMF FF%%%%.... . 7.9 2.0 0.0 16 17 12.2 0.0 0.0 XMMMMMMMMF FF%%%..... . 7.8 2.0 0.0 17 18 10.9 0.0 0.0 XMMMMMMMMF %%%%..... 7.4 2.0 0.0 18 19 9.9 0.0 0.0 XMMMMMMMM% %%%..... 7.1 2.0 0.0 19 20 8.6 0.0 0.0 XMMMMMMM%% %.... 6.3 2.0 0.0 20 21 8.5 0.0 0.0 XMMMMMMF%% %.... 6.2 2.0 0.0 21 22 12.6 0.0 6.5 SSMMMF FF%%%%... 7.8 4.6 4.4 22 23 18.5 0.0 9.4 ASSSX MMMFFFFF%% %... 11.4 10.1 5.8 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) 12-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000