SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 24 September, 2026 T-index: 45 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-45 1E 15 1 5 10 15 20 25 30 35 40 2F 58-64 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 6.7 7.1 3.5 AXMMM%. 5.8 4.3 2.8 00 01 7.1 7.9 3.8 XMMM%.. 6.1 4.8 3.1 01 02 7.2 8.4 4.0 XXMMP.. 6.4 5.2 3.2 02 03 7.4 8.7 4.1 SXMMM%. . 6.5 5.4 3.3 03 04 7.7 8.8 4.2 SXMMM%. . 6.8 5.4 3.3 04 05 7.8 8.8 4.1 SXMMM%. . 6.8 5.4 3.3 05 06 7.6 8.5 4.0 XXMMM%. . 6.6 5.2 3.2 06 07 7.3 8.0 3.8 XMMMM%. 6.4 4.9 3.1 07 08 7.1 7.3 3.5 AXMMM%.. 6.2 4.4 2.9 08 09 6.9 6.0 3.0 AMMMM%.. 5.9 3.6 2.5 09 10 6.1 2.9 1.6 AMMMMM%. 5.3 0.0 1.6 10 11 5.2 1.1 0.0 MMMMMM%.. 4.5 0.6 0.0 11 12 4.5 1.1 0.0 MMMMM%.. 4.1 0.6 0.0 12 13 4.1 1.1 0.0 MMMMM.. 3.7 0.6 0.0 13 14 4.0 1.1 0.0 MMMM%. 3.6 0.6 0.0 14 15 4.0 1.1 0.0 MMMM%. 3.7 0.6 0.0 15 16 3.9 1.1 0.0 MMMM%. 3.6 0.6 0.0 16 17 3.8 1.1 0.0 MMMM.. 3.5 0.6 0.0 17 18 3.7 1.1 0.0 MMMM.. 3.4 0.6 0.0 18 19 3.5 1.1 0.0 MMMM. 3.3 0.6 0.0 19 20 3.3 1.1 0.0 MMM%. 3.1 0.6 0.0 20 21 3.3 1.1 0.0 MMMM. 3.1 0.6 0.0 21 22 4.3 1.1 0.0 MMMM%. 3.9 0.0 1.1 22 23 6.0 5.8 2.9 XMMM%. 5.1 3.4 2.4 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) 24-Sep-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000