SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 3 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 7-12 1E 0 1 5 10 15 20 25 30 35 40 2F 22-29 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 18.9 0.0 10.9 ASSS XXMMFFFF%% %%.... 11.9 12.3 6.6 00 01 20.3 0.0 11.7 SSS SXXMMFFFFF %%%%.... 12.5 13.6 7.1 01 02 21.2 0.0 12.2 SSS SSXXMFFFFF F%%%%.... 12.7 14.4 7.4 02 03 22.4 0.0 12.5 ASS SSXXMFFFFF FF%%%..... 13.1 14.8 7.5 03 04 22.6 0.0 12.6 ASS SSXXMMFFFF FF%%%%.... 13.3 15.0 7.5 04 05 22.9 0.0 12.4 SSS SSXXMMFFFF FF%%%%.... . 13.4 14.8 7.4 05 06 22.6 0.0 12.1 SSS SSXXMMFFFF FF%%%%.... . 13.4 14.4 7.2 06 07 21.9 0.0 11.5 ASSS SXXMMMFFFF F%%%%%.... . 13.0 13.4 6.9 07 08 21.3 0.0 10.5 SSSS XMMMMFFFFF F%%%%..... 12.9 11.9 6.4 08 09 20.2 0.0 8.9 ASSXM MMMMMFFFFF %%%%..... 12.6 9.4 5.5 09 10 18.3 0.0 3.3 MMMMMMM MMMMFFFF%% %%%..... 11.8 0.0 3.8 10 11 16.0 0.0 0.0 XMMMMMMMMM MMMFF%%%%% %...... 10.8 2.0 0.0 11 12 14.3 0.0 0.0 XMMMMMMMMM MMFF%%%%.. .... 9.6 2.0 0.0 12 13 13.5 0.0 0.0 XMMMMMMMMM MFF%%%%... ... 9.0 2.0 0.0 13 14 12.6 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.2 2.0 0.0 14 15 12.7 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.1 2.0 0.0 15 16 12.5 0.0 0.0 XMMMMMMMMM FF%%%%.... . 8.0 2.0 0.0 16 17 12.3 0.0 0.0 XMMMMMMMMF FF%%%%.... . 7.9 2.0 0.0 17 18 10.9 0.0 0.0 XMMMMMMMMF %%%%..... 7.4 2.0 0.0 18 19 9.8 0.0 0.0 XMMMMMMMM% %%%..... 7.1 2.0 0.0 19 20 8.5 0.0 0.0 XMMMMMMM%% %..... 6.4 2.0 0.0 20 21 8.4 0.0 0.0 XMMMMMMF%% %..... 6.1 2.0 0.0 21 22 12.2 0.0 7.0 ASMMMF FF%%%.... 7.7 6.0 4.6 22 23 17.3 0.0 9.6 ASSSX MMFFFFF%%% .... 10.6 10.3 5.9 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) 3-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000