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 with no significant flares detected
in the last 24 hours. NOAA AR2833 (Catania sunspot group 7) remained
inactive with a simple unipolar magnetic field configuration. No other
regions are visible on the solar disc. The X-ray flare activity is expected
to remain at very low levels for the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) were 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 so in the next 24 hours. The greater than
2MeV electron flux remained under the 1000 pfu threshold and is expected to
remain so. The 24h electron fluence was at nominal levels and is expected
to remain predominantly at nominal levels in the next 24 hours.
Intermittent transitions to moderate levels are possible.

Over the past 24h the solar wind parameters (ACE and DSCOVR) were elevated
due to the arrival of a CIR around 12 UTC on June 15th followed by a high
speed stream (HSS). Between 12 UTC and 14 UTC on June 15th the solar wind
speed showed a rapid increase from below 400 km/s to approximately 600 km/s
and remained about 580 km/s on average after. The total magnetic field
varied between 3 nT and 16 nT. The Bz component fluctuated mildly with
typical values above - 5nT with the exception of a short-lived minimum of
-14 nT registered at the arrival of the CIR. The solar wind temperature was
elevated as expected for HSS conditions and the orientation of the
interplanetary magnetic field was predominantly in the negative sector,
reflecting the polarity of the geo-effective coronal hole. The solar wind
parameters are expected to remain elevated over the day and slowly return
to background slow solar wind conditions on June 18th as the effect of the
HSS subsides.

The geomagnetic conditions over the past 24 hours were unsettled to active
with an isolated period of minor storm conditions as registered by the Kp
index between 18:00 and 21:00 UTC on June 15th. Locally, in Dourbes, the
observed geomagnetic conditions were quiet to active. Unsettled to active
geomagnetic conditions are expected for the next 24 hours with chances for
an isolated minor geomagnetic storm due to the ongoing 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

Latest HUMAIN Callisto qkl

Daily estimated sunspot number

Most recent alerts

2021 Jun 15 1327 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2021 Jun 02 1826 UTC
At 12:20 UT on June 02, a solar wind shock was observed in the solar wind [more]

2021 Mar 18 0131 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2017 Sep 10 1650 UTC
A class X8.9 solar X-ray flare occurred on 2017/09/10 with peak time 16:06UT [more]