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.


Solar activity remains to be at very low level, and there were no flares
reported during last 24 hours. As there are no active regions present at
the visible side of the Sun, we expect such a low flaring activity to
persist in the coming hours.
No Earth directed CMEs were observed during last 24 hours, and the solar
protons remained at the background level.

The increase of the solar wind speed, associated with patchy equatorial
coronal hole that reached central meridian on July 16, is expected at the
Earth late on July 19. The unsettled to possibly, but not very probably,
active conditions are expected in the morning of July 20, due to the
expected arrival of the fast solar wind.
The geomagnetic conditions are presently quiet, and we expect them to stay
so in the coming hours.

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

2018 Jul 09 2211 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2018 Jul 06 1102 UTC
CORRECTION - Concerning:PRESTO issued at 20:10 UT on 05-Jul-2018. Following [more]

2018 May 04 1644 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]

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