SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Bunbury Perth Date: 22 January, 2026 T-index: 50 Bearings: 8 188 Distance: 155 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 4.8 3.5 2.7 AF%%. 00 01 5.1 3.8 2.9 AFF%. 01 02 5.4 4.0 3.1 BF%.. 02 03 5.8 4.2 3.2 BF%%. 03 04 6.0 4.2 3.2 BF%%.. 04 05 6.2 4.2 3.2 BFF%.. 05 06 6.1 4.1 3.1 BFF%.. 06 07 6.0 3.9 3.0 AFF%%.. 07 08 5.9 3.7 2.9 AFF%%. 08 09 5.7 3.3 2.6 AFF%%. 09 10 5.4 2.8 2.2 FFF%.. 10 11 5.2 1.5 1.4 FFFF%.. 11 12 5.0 0.5 0.0 FFFF%%. 12 13 4.7 0.5 0.0 FFFF%%. 13 14 4.4 0.5 0.0 FFFF%. 14 15 4.3 0.5 0.0 FFFF%. 15 16 4.1 0.5 0.0 FFFF%. 16 17 4.0 0.5 0.0 FFF%%. 17 18 3.7 0.5 0.0 FFF%. 18 19 3.5 0.5 0.0 FFF%. 19 20 3.3 0.5 0.0 FFF.. 20 21 3.4 0.5 0.0 FFF%. 21 22 3.8 2.2 1.9 AF%.. 22 23 4.4 3.0 2.4 BF%. 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-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000