SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Bunbury Perth Date: 8 November, 2026 T-index: 60 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 5.3 3.5 2.8 AFF%.. 00 01 5.6 3.8 3.0 AFF%%. 01 02 6.0 4.1 3.1 BF%%.. 02 03 6.5 4.2 3.2 BFF%%. 03 04 6.8 4.3 3.2 BFF%%.. 04 05 6.9 4.2 3.2 BFF%%.. 05 06 6.7 4.1 3.2 BFF%%.. 06 07 6.5 4.0 3.1 BFF%%. 07 08 6.4 3.7 2.9 AFFF%%. 08 09 6.3 3.3 2.6 AFFF%.. 09 10 5.9 2.7 2.2 FFF%%.. 10 11 5.6 0.5 0.4 FFFFF%%.. 11 12 5.2 0.5 0.0 FFFFF%.. 12 13 4.7 0.5 0.0 FFFF%%. 13 14 4.4 0.5 0.0 FFFF%.. 14 15 4.4 0.5 0.0 FFFF%. 15 16 4.3 0.5 0.0 FFFF%. 16 17 4.1 0.5 0.0 FFFF%. 17 18 3.9 0.5 0.0 FFF%.. 18 19 3.7 0.5 0.0 FFF%. 19 20 3.5 0.5 0.0 FFF%. 20 21 3.7 0.5 0.0 FFF%. 21 22 4.4 2.1 1.8 AFF%. 22 23 4.9 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) 8-Nov-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000