Solar flare activity on UT day 20-Oct is expected to be at R0-R1 levels. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be light to moderate. G0 geomagnetic conditions are expected, with a chance of G1. Global high frequency radio propagation conditions are expected to be normal to fair. Maximum Usable Frequencies (MUFs) in the Australian region are expected to be near predicted monthly values, with some mild depressions possible. Shortwave fadeouts are possible.