SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 8 October, 2026 T-index: 50 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-46 1E 15 1 5 10 15 20 25 30 35 40 2F 58-65 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 6.7 7.4 3.6 AXMMM%. 5.9 4.5 2.9 00 01 7.0 8.1 3.9 XMMMP.. 6.2 5.0 3.1 01 02 7.3 8.6 4.1 SXMMM%. 6.5 5.3 3.3 02 03 7.6 8.9 4.2 SXMMM%. . 6.7 5.5 3.4 03 04 8.0 9.0 4.3 SXMMMP. . 7.0 5.5 3.4 04 05 8.1 8.9 4.2 SXMMM%% . 7.1 5.5 3.4 05 06 7.9 8.7 4.1 SXMMM%. . 6.9 5.3 3.3 06 07 7.5 8.2 3.9 XMMMM%. . 6.6 5.0 3.2 07 08 7.3 7.5 3.7 AXMMMM%. 6.4 4.5 3.0 08 09 7.1 6.4 3.2 AMMMM%.. 6.2 3.8 2.6 09 10 6.5 4.2 2.3 AMMMMM%.. 5.7 2.3 1.9 10 11 5.6 1.1 0.0 MMMMMM%... 5.0 0.7 0.0 11 12 4.9 1.1 0.0 MMMMMM.. 4.4 0.7 0.0 12 13 4.4 1.1 0.0 MMMMM%. 4.0 0.7 0.0 13 14 4.3 1.1 0.0 MMMMM.. 3.9 0.7 0.0 14 15 4.3 1.1 0.0 MMMMM.. 3.9 0.7 0.0 15 16 4.1 1.1 0.0 MMMM%. 3.8 0.7 0.0 16 17 4.0 1.1 0.0 MMMM%. 3.7 0.7 0.0 17 18 3.9 1.1 0.0 MMMM%. 3.6 0.7 0.0 18 19 3.7 1.1 0.0 MMMM.. 3.4 0.7 0.0 19 20 3.5 1.1 0.0 MMMM. 3.2 0.7 0.0 20 21 3.6 1.1 0.0 MMMM. 3.3 0.7 0.0 21 22 4.9 3.5 1.9 AMMM%. 4.3 0.0 1.7 22 23 6.1 6.2 3.1 AMMM%. 5.3 3.7 2.5 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) 8-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000