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.

INFO FROM SIDC - RWC BELGIUM 2014 Sep 22 13:05:09

Solar X-ray flaring activity was very low with no flares detected over the
last 24 hours.
The potential flaring source regions are all located at the eastern
hemisphere. C flaring with a chance for M-flares is expected in the next 24
hours with especially AR 2172 (beta-delta) as potential source region.
Two significant partial halo CME's were recorded (reported as one event by
Both are assessed to be related to backside activity and will therefore not
be geo-effective.
The onset of the first was missed in SOHO/LASCO C2 images due to a data
gap. In SOHO/LASCO C3 it becomes visible at 6:54UT. It is, however, well
recorded by STEREO B where it is first visible in COR2 images around 6:25
UT onwards. The mass is expelled predominantly in north-eastern direction
from the Sun-STEREO B line i.e. North-Western direction as seen from Earth.
In STEREO B/EUVI 193 it can be seen to originate from AR 2158, currently at
about 150 degrees west (with respect to the Sun-Earth line), and hence
backsided. This event is believed to be responsible for the rise in >10 MeV
proton levels starting at around 8:00 UT, and which currently seems to
reach its peak at about an order of magnitude below the event threshold.
The second event is first visible in SOHO/LASCO C2 data at 8:48 UT and as
seen from the Sun-Earth line it is directed predominantly in eastern
direction. It can be related to flaring activity at the centre of the disc
as seen from STEREO B, and CME is hence judged to be backsided. STEREO B
EUVI 193 images capture it just after suffering a data gap and the most
important activity is probably missed. Being directed towards STEREO B and
rather faint, it is only very weakly visible in STEREO B COR2 coronagraph
data.  Solar wind conditions are returning to nominal. Solar wind speed
decreased from around 540 km/s at the start of the reporting period to
around 440 km/s at the end. Total magnetic field is just over 5 nT with the
Bz component changing from predominantly positive to predominantly negative
after a sector boundary crossing from a negative (towards) into a positive
(away) sector after 2:00 UT.
Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-3, local K
Dourbes 0-3).
Nominal solar wind conditions and quiet to unsettled geomagnetic conditions
are expected to first continue, with later increased activity possible from
September 23 onwards due to the influence of a corotating interaction
region and a coronal hole high speed stream.

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

2014 Sep 22 1234 UTC
The latest Cactus CME alert merged two separate CME's which were both, [more]

2014 Sep 07 1337 UTC
The latest halo CME alert generated by the CACTus software package: 025|2014/09/06 [more]

2014 Aug 08 1211 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Latest News

Sep 17, 2014: Number 35

Sep 11, 2014: High solar activity! (NL-FR-EN) - UPDATED

Sep 10, 2014: High solar activity! (NL-FR-EN)

Sep 10, 2014: Backside Blast

Sep 03, 2014: NOAA 2146 bursts its bubble...

click here for all the news items

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