INFO FROM SIDC - RWC BELGIUM 2021 Sep 10 12:33UTC

Over the past 24 hours the solar activity has decreased to very low levels.
There remain to be six active regions present on the visible solar disc.
NOAA 2866/Catania 40 (beta) remained the largest active region and almost
doubled its number of sunspots, yet it produced only high B-class flaring.
NOAA 2868/Catania 39 (beta-gamma) has increased its magnetic complexity and
produced a long-duration high B-class flaring. NOAA 2864/Catania 38 (alpha)
and NOAA 2863/Catania 37 (alpha) remained stable and are now approaching
the west limb. NOAA 2869/Catania 41 (beta) showed slight development, but
no sign of activity yet. The recently rotated from the south-east limb
active region Catania 42 has now been numbered as NOAA 2870 and remained a
simple alpha. The X-ray flare activity is expected to be at very low to low
levels for the next 24 hours with remaining significant change for C-class
flaring and a minor chance for M-class flaring from NOAA 2866 or NOAA
2868.

No Earth-directed CMEs were detected in the available coronagraph imagery
over the past 24 hours. An update to yesterday’s forecast: a minor glancing
blow from the CME lunched from the Sun around 00:36 UTC on Sept 8th is now
estimated to arrive to the Earth during early on Sept 12th.

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours and is expected to remain so in the next 24 hours. The greater than
2MeV electron flux was below the 1000 pfu threshold and is expected to
remain so in the next 24 hours. The 24h fluence for the greater than 2MeV
electron flux was at nominal levels and is expected to remain so in the
next 24 hours.

Around 09:45 UTC this morning the solar wind parameters (ACE and DSCOVR)
registered the arrival of an ICME (potentially the partial halo CME
launched from the Sun on Sept 06th from NOA 2865 and forecasted to arrive
today). The solar wind speed is still low, below 400 km/s, but is expected
to increase in the upcoming hours. The total magnetic field is currently at
11 nT and could show further increase. Since the arrival of the ICME the Bz
component has remained positive with a maximal value of 6.8 nT. The
interplanetary magnetic field showed a smooth rotation from the negative to
the positive sector registering the arrival of the ICME.

The geomagnetic conditions over the past 24 hours were quiet to unsettled.
Quiet to active geomagnetic conditions are expected for the next 24 hours
with a small chance of a minor storm later today.