The SIDC is part of the Royal Observatory of Belgium and a partner in the Solar Terrestrial Center of Excellence (STCE).

INFO FROM SIDC - RWC BELGIUM 2021 Dec 04 12:34UTC

Solar activity was at low levels over the last 24 hours. NOAA AR 2898
produced a number of low-level C-class flares near the western limb, but
has now rotated over limb. NOAA AR 2902 has continued to decay. Solar
activity is expected to be at very low levels, with a slight chance for a
C-class flare.

A narrow Coronal Mass Ejection (CME) observed in STEREO-A COR2 from 12:54UT
Dec 03 is believed to be associated with the filament eruption from the
north west quadrant that was observed from 07UT Dec 03 in SDO AIA 304. It
is not expected to arrive to Earth. No Earth directed CMEs have been
detected in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours and is expected to remain at nominal levels in the next 24 hours. The
greater than 2 MeV electron flux exceeded the 1000 pfu alert threshold in
the past 24 hours and is expected to exceed this threshold in the next 24
hours. The greater than 2 MeV electron fluence increased to be at moderate
levels in the past 24 hours and is expected to be at moderate levels in the
next 24 hours.

The solar wind speed (DSCOVR) displayed a decreasing trend at the start of
the period, but began to increase again from 23UT Dec 03 to values around
530 km/s. By the end of the period the speed was just under 500 km/s. The
total magnetic field fluctuated between 1 and 9 nT. Bz ranged between -7
and +7 nT. The interplanetary magnetic field phi angle was predominantly in
the positive sector (directed away from the Sun). The solar wind speed is
expected to be elevated on Dec 04 and with further enhancements possible on
Dec 05, due to the influence of the HSS from the positive polarity Coronal
Hole (CH) that began to traverse the central meridian on Dec 02.

Geomagnetic conditions were quiet to active over the past 24 hours (NOAA Kp
and K-BEL recorded values of 1-3 and 1-4, respectively). Geomagnetic
conditions are expected to be mostly quiet to unsettled with isolated
active periods likely on Dec 04 and Dec 05, due to the expected HSS
influence.

Latest SWAP image

SWAP latest image

Latest USET H-alpha image
USET latest Halpha image

Latest LYRA curve

Latest LYRA Curves

Latest Callisto Observations

Daily estimated sunspot number
EISN

Most recent alerts

2021 Nov 27 2244 UTC
A shock was observed in DSCOVR data at 21:55 UT. The magnetic field jumped [more]

2021 Nov 27 1232 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2021 Nov 02 1041 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2021 Oct 28 1604 UTC
A class X1.0 solar X-ray flare occurred on 2021/10/28 with peak time 15:34UT [more]