SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 12 November, 2026 T-index: 80 Bearings: 15 195 Distance: 196 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F/1E: Near 90 1 5 10 15 20 25 30 35 40 ** NONE ** UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.6 3.9 3.0 AFF%%. 00 01 5.9 4.3 3.2 BF%%.. 01 02 6.4 4.5 3.3 BFF%%. 02 03 6.9 4.7 3.4 BFF%%.. 03 04 7.2 4.7 3.5 AFFF%.. 04 05 7.3 4.7 3.5 AFFF%%. 05 06 7.0 4.6 3.4 BFF%%.. 06 07 6.8 4.4 3.3 BFF%%.. 07 08 6.6 4.1 3.1 BFF%%.. 08 09 6.5 3.7 2.8 AFFF%%.. 09 10 6.3 3.0 2.4 BFFF%%. 10 11 6.0 1.3 1.2 FFFF%%.. 11 12 5.6 0.6 0.0 FFFFF%%. 12 13 5.1 0.6 0.0 FFFFF%.. 13 14 4.9 0.6 0.0 FFFF%%. 14 15 4.7 0.6 0.0 FFFF%%. 15 16 4.6 0.6 0.0 FFFF%.. 16 17 4.4 0.6 0.0 FFFF%. 17 18 4.3 0.6 0.0 FFFF%. 18 19 4.2 0.6 0.0 FFFF%. 19 20 4.0 0.6 0.0 FFF%.. 20 21 4.2 0.6 0.0 FFFF%. 21 22 4.7 2.4 2.0 AFF%.. 22 23 5.1 3.4 2.6 AFF%.. 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-Nov-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000