[ips-sf] ASWFC Summary Forecast for 18 December - issued 2314UT/17-Dec-2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

On UT day 18-Dec solar activity is expected to be R0. S0 solar
radiation storm conditions are expected. The solar wind speed is
expected to be strong to very strong. G0-G1 geomagnetic conditions are
expected. HF radio propagation conditions are expected to be fair.
Maximum usable frequencies in the Australian region are expected to be
15-20% depressed to near predicted values.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au