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


Solar activity was at very low levels over the last 24 hours. There were
three Active Regions (AR) visible on the Sun over the past 24 hours. NOAA
AR 2900 has now rotated over the west solar limb and AR 2898 will soon
follow. NOAA AR 2902 (beta magnetic configuration) has not produced any
significant activity. Solar activity is expected to be at very low levels,
with a slight chance for a C-class flare.

No Earth directed CMEs have been detected in the available coronagraph

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 just exceeded the 1000 pfu alert threshold
in the past 24 hours and is expected to exceed this threshold again in the
next 24 hours. The greater than 2 MeV electron fluence was at nominal
levels in the past 24 hours and is expected to reach moderate levels in the
next 24 hours.

The Earth continued to be under the influence of a High Speed Stream (HSS)
over the past 24 hours. The solar wind speed (DSCOVR) ranged between 450
and 580 km/s. The total magnetic fluctuated between 1 and 8 nT with a
mostly negative Bz. The interplanetary magnetic field phi angle was
predominantly in the positive sector (directed away from the Sun). The
solar wind speed is expected to remain elevated over the coming days in
response to this High Speed Stream (HSS) and may be further enhanced, due
to the expected arrival of a HSS from the positive polarity Coronal Hole
(CH) that began to traverse the central meridian on Nov 30.

Geomagnetic conditions were unsettled to active over the past 24 hours
(NOAA Kp and K-BEL recorded values of 2-4 and 1-4, respectively).
Geomagnetic conditions are expected to be unsettled to active on Dec 02 and
Dec 03, with minor storm conditions possible from late on Dec 02 due to the
arrival of the expected HSS.

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

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]