SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 12 March, 2026 T-index: 100 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-47 1E 15 1 5 10 15 20 25 30 35 40 2F 58-66 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 8.2 7.7 3.9 XMMMM%. . 7.1 4.7 3.1 00 01 8.8 8.5 4.2 SXMMMM% .. 7.7 5.2 3.4 01 02 9.2 9.1 4.5 AXMMMM% .. 8.0 5.6 3.6 02 03 9.6 9.4 4.6 AXMMMM% %.. 8.4 5.8 3.7 03 04 9.8 9.5 4.6 AXMMMMM %.. 8.5 5.8 3.7 04 05 10.0 9.4 4.6 AXMMMMM %.. 8.8 5.8 3.7 05 06 10.0 9.1 4.5 AXMMMMM %%. 8.7 5.6 3.6 06 07 9.7 8.6 4.3 SXMMMMM %.. 8.5 5.3 3.4 07 08 9.5 7.9 4.0 XMMMMMM %.. 8.2 4.8 3.2 08 09 9.2 6.6 3.4 AMMMMMM% %. 8.0 4.0 2.8 09 10 8.5 4.0 2.2 AMMMMMMM% .. 7.5 2.0 2.0 10 11 7.7 1.3 0.0 MMMMMMMM%. . 6.7 0.8 0.0 11 12 6.9 1.3 0.0 MMMMMMM%.. 6.0 0.8 0.0 12 13 6.2 1.3 0.0 MMMMMMM.. 5.5 0.8 0.0 13 14 5.7 1.3 0.0 MMMMMM%. 5.2 0.8 0.0 14 15 5.4 1.3 0.0 MMMMMM.. 5.0 0.8 0.0 15 16 5.3 1.3 0.0 MMMMMM.. 4.9 0.8 0.0 16 17 5.1 1.3 0.0 MMMMM%.. 4.6 0.8 0.0 17 18 4.9 1.3 0.0 MMMMM%. 4.5 0.8 0.0 18 19 4.6 1.3 0.0 MMMMM.. 4.2 0.8 0.0 19 20 4.3 1.3 0.0 MMMMM. 4.0 0.8 0.0 20 21 4.2 1.3 0.0 MMMMM. 4.0 0.8 0.0 21 22 5.1 2.8 1.7 AMMM%. 4.6 0.0 1.7 22 23 7.1 6.4 3.3 AMMMM%. 6.1 3.8 2.7 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) 12-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000