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.


Over the past 24 hours solar activity has been low. There have been six
B-flares flares originated at NOAA AR 2644 (McIntosh: Eso; Mag.Type: Beta),
AR 2645 (McIntosh: Dsi; Mag.Type: Beta) and AR 2646 (McIntosh: Axx;
Mag.Type: Alpha). The biggest flare B6.5 peaked yesterday (29-Mar-2017) at
23:32 UT originated at NOAA AR 2644. No Earth-directed CMEs have been
detected over the past 24 hours. Solar protons have remained at background
levels over the past 24 hours. No Earth directed Coronal Mass Ejections
(CMEs) have been detected. Solar X-Ray background level is expected to
remain low. NOAA AR 2646 is about to rotate over the east limb. NOAA AR
2645 and AR 2644 are expected to produce more B-class flares over the next
24 hours. C-class flares are also not excluded. 
Solar wind parameters indicate the influence of high speed stream (HSS)
from the recurrent negative polarity coronal hole that arrived at the Earth
27-Mar-2017. Total Interplanetary magnetic field remained stable varying
from 3 to 6 nT. The Bz component had two prolongated periods of negative
values varying from -6 nT to 5 nT over the past 24 hours. Solar wind speed
remained stable at high levels varying around 620 km/s. Solar wind speed is
expected to remain at high levels under CH HSS regime. WSA-Enlil model
simulations predict even more elevated solar wind speed  for the next two
days due to the global reconnection processes in near Earth space. The
geomagnetic field was from unsettled to active levels during the past 24
hours (K Dourbes between 1 and 3; NOAA Kp between 2 and 4) till 03:00 UT
this morning (30-Mar-2017), when NOAA Kp index reached minor storm levels
(Kp=5), at 06:00 UT Kp index returned to nominal value (Kp=3). The
geomagnetic field is expected to continue at active levels mostly for the
next two days with isolated episodes of minor storming (Kp=5) in response
to the agitated solar wind conditions.

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

2017 Mar 30 0656 UTC
As expected, the arrival of the high speed stream (HSS) from the recurrent [more]

2016 Nov 05 1349 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2016 Jul 24 0516 UTC
A class M5.5 solar X-ray flare occurred on 2016/07/23 with peak time 05:31UT [more]

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

Science Highlights

Mar 29, 2017: C-class flares at last!

Mar 27, 2017: A good catch

Mar 22, 2017: Sleeping Beauty

Feb 28, 2017: PROBA2 observed a solar eclipse

Feb 28, 2017: First GOES-16 solar images

click here for all science highlights


Oct 26, 2016: High-speed solar wind causes major geomagnetic storm (NL-FR-EN)

May 04, 2016: Mercury Transit

Mar 23, 2016: STCE 10 years - Happy Birthday!

Click here for all the press releases

Good to know


14th European Space Weather Week

Topical Issue for the SWSC Journal