[ips-sf] ASWFC Summary Forecast for 19 December - issued 2314UT/18-Dec-2023 [SEC=OFFICIAL]

[rwc]

Solar activity on UT day 19-Dec is expected to be at R0-R1 levels. The
solar wind speed is expected to be moderate to strong due to a coronal
hole wind stream. G0 geomagnetic conditions are expected, with the
slight chance of an isolated G1 period. Geomagnetic activity is
currently mildly elevated due to a combination of declining CME and
increasing coronal hole wind stream influences. HF radio communication
conditions are expected to be fair. Maximum usable frequencies (MUFs)
are expected to be depressed in the Australian region by up to 15-20%.
MUFs are expected to recover later today. Isolated shortwave fadeouts
are possible.

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