[ips-sf] ASWFC Summary Forecast for 11 October - issued 1624UT/10-Oct-2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

A CME shock arrival has been observed in the solar wind at 10/1450UT.
The solar wind speed became very strong increasing from 460km/sec to
775km/sec. The north-south component of the interplanetary magnetic
field became southward falling to -25nT post shock arrival and is
currently orientated southward at -18nT. An increase in geomagnetic
activity has followed the CME shock arrival reaching planetary G3
conditions with G2 conditions observed for the Australian region at
10/1600UT. On UT day 10-Oct solar activity is expected to be R1-R3.
The solar wind is expected to become strong. G3-G4 geomagnetic
conditions are expected later in the UT day. HF radio communication
conditions are expected to become degraded with the onset of the
geomagnetic activity. Maximum usable frequencies are expected to be
near predicted values to 30% depressed. S1-S2 solar radiation storm
conditions are expected with a chance for S3. Auroras may be seen at
high to middle latitudes during local night hours. Shortwave fadeouts
are probable.

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