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.


The solar activity has been quiet over the past 24 hours. The visible solar
disc is spotless and no significant flare has been recorded. Quiet flaring
conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The solar
protons flux remained at nominal levels over the past 24 hours and is
expected to remain so.

The solar wind speed reached about 440 km/s on July 13 around 11:00-12:00
UT and decreased to about 325 km/s, the total interplanetary magnetic
fields remained below 3 nT, and the southward magnetic component varied
between -2 and 2.5 nT. Solar wind parameters are expected to remain at
nominal levels for the next 24 hours. The fast solar wind associated to the
coronal hole that reached the central meridian on July 11 is expected to
reach Earth on July 14 around midnight, which will enhance the solar wind

The geomagnetic conditions were quiet and it is expected to remain quiet as
the Earth remains in the slow solar wind speed regime. Enhancement of the
geomagnetic conditions are expected on July 14 with to the arrival of the
high speed solar wind associated with the coronal hole.

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 Aug 13 1212 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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