SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 22 March, 2026 T-index: 65 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 7.5 7.3 3.6 AXMMM%%. 6.4 4.4 2.9 00 01 8.1 8.1 3.9 XMMMM%. . 7.0 4.9 3.2 01 02 8.4 8.6 4.1 SXMMM%% .. 7.3 5.3 3.3 02 03 8.6 8.9 4.3 SXMMMM% .. 7.5 5.5 3.4 03 04 8.9 9.1 4.3 AXMMMM% .. 7.8 5.5 3.5 04 05 9.1 9.0 4.3 SXMMMM% %.. 7.9 5.5 3.4 05 06 8.9 8.7 4.2 SXMMMM% %.. 7.8 5.3 3.4 06 07 8.7 8.2 4.0 XMMMMM% %. 7.6 5.0 3.2 07 08 8.4 7.4 3.6 AXMMMMM% .. 7.3 4.5 2.9 08 09 8.2 6.1 3.1 AMMMMM%% .. 7.1 3.6 2.5 09 10 7.1 2.5 1.5 AMMMMMM%. . 6.1 0.0 1.5 10 11 5.9 1.2 0.0 MMMMMMM%.. 5.2 0.7 0.0 11 12 5.2 1.2 0.0 MMMMMM%.. 4.7 0.7 0.0 12 13 4.6 1.2 0.0 MMMMM%.. 4.2 0.7 0.0 13 14 4.4 1.2 0.0 MMMMM%. 4.0 0.7 0.0 14 15 4.5 1.2 0.0 MMMMM.. 4.1 0.7 0.0 15 16 4.4 1.2 0.0 MMMMM.. 4.0 0.7 0.0 16 17 4.3 1.2 0.0 MMMMM.. 3.9 0.7 0.0 17 18 4.2 1.2 0.0 MMMMM. 3.8 0.7 0.0 18 19 4.0 1.2 0.0 MMMM%. 3.7 0.7 0.0 19 20 3.8 1.2 0.0 MMMM%. 3.5 0.7 0.0 20 21 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 21 22 4.3 1.2 0.0 MMMM%. 3.9 0.7 0.6 22 23 6.4 5.8 3.0 XMMM%.. 5.4 3.5 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) 22-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000