SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Carnarvon Perth Date: 2 February, 2026 T-index: 120 Bearings: 165 344 Distance: 815 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 30-42 1E 10 1 5 10 15 20 25 30 35 40 2F 50-61 2E 22 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 8.2 10.0 5.1 ASMMMPP ... 6.6 5.9 3.5 00 01 8.8 11.0 5.5 ASXMMPP E.. 7.1 6.5 3.8 01 02 9.3 11.7 5.8 ASXMMMP P... 7.6 6.9 3.9 02 03 9.7 12.2 6.0 SXXMMP PP.. 8.0 7.2 4.1 03 04 10.0 12.3 6.1 SSXMMM PP... 8.2 7.3 4.1 04 05 10.2 12.3 6.1 SSXMMM PP... 8.3 7.2 4.1 05 06 10.3 12.1 6.0 ASXXMMM PP... 8.3 7.1 4.0 06 07 10.0 11.6 5.7 ASXMMMM P%... 8.1 6.8 3.9 07 08 9.6 10.8 5.4 ASXMMMP %%.. 7.8 6.3 3.7 08 09 9.3 9.6 4.9 SXMMMM% %... 7.5 5.7 3.3 09 10 9.1 7.8 4.1 ASMMMMM% %.. 7.3 4.6 2.8 10 11 9.0 1.7 0.0 MMMMMMMM%% %. 7.2 1.0 0.0 11 12 8.6 1.7 0.0 MMMMMMMM%% .. 7.0 1.0 0.0 12 13 8.4 1.7 0.0 MMMMMMMM%% . 6.9 1.0 0.0 13 14 7.6 1.7 0.0 MMMMMMM%%. . 6.4 1.0 0.0 14 15 7.4 1.7 0.0 MMMMMMM%%. 6.2 1.0 0.0 15 16 7.2 1.7 0.0 MMMMMMM%%. 6.0 1.0 0.0 16 17 7.1 1.7 0.0 MMMMMMM%.. 5.8 1.0 0.0 17 18 6.4 1.7 0.0 MMMMMM%%. 5.2 1.0 0.0 18 19 5.7 1.7 0.0 MMMMMM%. 4.7 1.0 0.0 19 20 5.2 1.7 0.0 MMMMM%.. 4.4 1.0 0.0 20 21 4.9 1.7 0.0 MMMMM%. 4.3 1.0 0.0 21 22 5.8 5.3 3.0 MMMM%.. 4.9 2.9 2.2 22 23 7.3 8.5 4.4 ASMMMP%. . 5.9 5.0 3.0 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) 2-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000