Welcome to the Solar Influences Data Analysis Center (SIDC), which is the solar physics research department of the Royal Observatory of Belgium. The SIDC includes the World Data Center for the sunspot index and the ISES Regional Warning Center Brussels for space weather forecasting.

STCE annual meeting - 10y celebration & roof top tour, June 9


NOAA 2567 started another active flaring episode shortly after midnight
producing 3 M-class flares. The intensities and peak timings of the events
were resp. M5.0 (02:11UT), M7.6 (05:16UT), and M5.5 (05:31UT). In
particular the last event was accompanied by an impressive ejection of
material. San Vito reported a type II radio burst with related shock speed
of the disturbance of 729 km/s. The greater than 10 MeV proton flux is
somewhat enhanced (0.77 pfu at 07:25UT), but has remained so far well below
the event threshold (10 pfu). The currently available coronagraphic images
show that the bulk of the associated coronal mass ejections (CMEs) is
directed away from the Earth. However, a glancing blow from the CME of the
double-peaked M-class event cannot be excluded. No other earth-directed
CMEs were observed. 

An accurate assessment of the magnetic configuration of the NOAA 2565 /
2567 sunspot cluster is difficult due to its close proximity near the west
limb. Nonetheless, further M-class flaring is possible, with a small chance
on an X-class flare. A warning for a potential proton event has been put
into effect.

The interplanetary magnetic field was directed towards the Sun (negative),
except during the 17:00-02:00UT interval when it was steadily positive
(away from the Sun). This interval corresponded to somewhat elevated solar
wind speeds between about 440 and 500 km/s and Bz near 0 nT. At the end of
the reporting period, solar wind parameters were back at nominal values
with wind speed near 390 km/s, and Bz varying between -8 and +7 nT. A small
positive coronal hole (CH; latitude +20 degrees) is near the central
meridian. Quiet to unsettled geomagnetic conditions were observed.

Mostly quiet to unsettled geomagnetic conditions are expected. An active
episode is not excluded, in particular on 25 July when a glancing blow from
the 23 July CME is possible.

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

2016 Jul 23 0554 UTC
A class M7.6 solar X-ray flare occurred on 2016/07/23 with peak time 05:16UT [more]

2016 Jul 20 0714 UTC
A shock in the solar wind speed was observed on 19 July at 23:05UT, with [more]

2016 Jul 05 2210 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2016 May 16 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

Science Highlights

Jul 19, 2016: Sunspot neighbours

Jul 12, 2016: SC24 highlights page

Jul 06, 2016: Backside eruptions

Jun 29, 2016: Impressive eruption

Jun 21, 2016: A long duration geomagnetic storm

click here for all science highlights


May 04, 2016: Mercury Transit (NL-FR-EN)

Mar 23, 2016: STCE 10 years - Happy Birthday (NL-FR-EN)

Jan 15, 2016: Space Technology & Calibration Laboratories

Click here for all the press releases

Good to know

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STCE annual meeting