SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 9 November, 2025 T-index: 105 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 39-52 1E 15 1 5 10 15 20 25 30 35 40 2F 58-69 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 7.3 8.2 4.1 SMMMM%. . 6.6 5.0 3.3 00 01 7.7 8.9 4.4 AXMMM%. . 6.9 5.4 3.6 01 02 8.2 9.4 4.6 AXMMMM% .. 7.4 5.7 3.7 02 03 8.6 9.7 4.7 AXMMMM% .. 7.8 5.9 3.8 03 04 8.9 9.8 4.8 AXMMMM% %.. 8.0 6.0 3.8 04 05 9.0 9.7 4.8 AXMMMM% %.. 8.0 5.9 3.8 05 06 8.7 9.4 4.7 AXMMMM% .. 7.7 5.8 3.7 06 07 8.4 9.0 4.5 AXMMMM% .. 7.5 5.5 3.6 07 08 8.2 8.3 4.2 SXMMMM% .. 7.3 5.1 3.4 08 09 8.1 7.4 3.8 XMMMMM% .. 7.2 4.4 3.1 09 10 8.1 5.8 3.1 AMMMMM%% .. 7.1 3.4 2.5 10 11 7.8 1.3 0.0 MMMMMMMM%. . 6.9 0.8 0.0 11 12 7.3 1.3 0.0 MMMMMMMM%. 6.5 0.8 0.0 12 13 6.6 1.3 0.0 MMMMMMM%. 6.0 0.8 0.0 13 14 6.2 1.3 0.0 MMMMMMM.. 5.6 0.8 0.0 14 15 5.9 1.3 0.0 MMMMMM%.. 5.4 0.8 0.0 15 16 5.8 1.3 0.0 MMMMMM%. 5.3 0.8 0.0 16 17 5.5 1.3 0.0 MMMMMM.. 5.0 0.8 0.0 17 18 5.1 1.3 0.0 MMMMMM.. 4.7 0.8 0.0 18 19 4.8 1.3 0.0 MMMMM%. 4.5 0.8 0.0 19 20 4.6 1.3 0.0 MMMMM.. 4.3 0.8 0.0 20 21 5.0 1.3 0.0 MMMMM%. 4.6 0.8 0.0 21 22 6.0 5.4 2.9 XMMM%.. 5.4 3.2 2.4 22 23 6.8 7.2 3.7 AXMMM%.. 6.1 4.3 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) 9-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000