[ips-sf] ASWFC Summary Forecast for 22 December - issued 2320UT/21-Dec-2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

Solar activity on UT day 22-Dec is expected to be at the R0-R1 level.
S0 solar radiation storm conditions are expected. The solar wind speed
is expected to be very strong over the UT day. G0-G1 geomagnetic
conditions are expected. HF radio propagation conditions are expected
to be Fair-normal across the Australian region. Maximum usable
frequencies (MUFs) in the Australian region are expected to be
depressed 15-20% compared with monthly values.

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