SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 4 June, 2026 T-index: 85 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 37-41 1E 15 1 5 10 15 20 25 30 35 40 2F 57-60 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 8.3 5.9 3.0 XMMMMF%. . 6.8 3.5 2.4 00 01 9.5 7.2 3.5 AXMMMMM% %. 7.9 4.4 2.8 01 02 10.2 8.0 3.8 XMMMMMF %.. 8.5 4.9 3.1 02 03 10.3 8.4 4.0 XXMMMMM %... 8.6 5.1 3.2 03 04 10.0 8.5 4.1 SXMMMM% %.. 8.5 5.2 3.3 04 05 10.1 8.4 4.0 XXMMMMM %.. 8.6 5.1 3.2 05 06 10.3 8.0 3.9 XMMMMMM %... 8.8 4.9 3.1 06 07 10.3 7.4 3.6 AXMMMMMM %%.. 8.8 4.4 2.9 07 08 10.0 6.1 3.1 AMMMMMM% %.. 8.4 3.6 2.5 08 09 9.1 2.5 1.4 MMMMMMMF% .. 7.5 0.0 1.6 09 10 6.9 1.2 0.0 MMMMMMM%.. 5.8 0.7 0.0 10 11 5.2 1.2 0.0 MMMMM%.. 4.5 0.7 0.0 11 12 4.4 1.2 0.0 MMMMM.. 4.0 0.7 0.0 12 13 4.0 1.2 0.0 MMMM%. 3.7 0.7 0.0 13 14 3.7 1.2 0.0 MMMM.. 3.5 0.7 0.0 14 15 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 15 16 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 16 17 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 17 18 3.6 1.2 0.0 MMMM.. 3.4 0.7 0.0 18 19 3.7 1.2 0.0 MMMM.. 3.4 0.7 0.0 19 20 3.7 1.2 0.0 MMMM.. 3.5 0.7 0.0 20 21 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 21 22 3.6 1.2 0.0 MMMM. 3.3 0.7 0.0 22 23 5.6 1.2 0.0 MMMMM%. 4.8 0.7 0.0 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) 4-Jun-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000