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 Dec 18 12:25:50

The Sun released one M flare and seven high C flares during the past 24
hours, produced by NOAA AR 2242 and 2241. The M1.4 flare was released by
NOAA AR 2241 on December 17 with peak time 19:01 UT. Measured on new LASCO
C3 imagery, the halo CME associated to the M8.7 flare of December 17 has an
estimated velocity of 538 km/s, which yields an estimated arrival time at
Earth around 15h UT on December 20. M and even X flaring from AR 2242 and
AR 2241 are possible in the next 24 hours. There is a chance for proton
storms in the days ahead.In the past 24 hours, solar wind speeds observed
by ACE were nominal between about 340 and 440 km/s. The magnitude of the
Interplanetary Magnetic Field (IMF) rose from about 5 to 7.5 nT. In the
past 24 hours, geomagnetic conditions were quiet (K Dourbes between 0 and
3; NOAA Kp between 1 and 2). Quiet geomagnetic levels (K Dourbes < 4) are
expected on December 18, 19 and the first half of December 20. Active (K
Dourbes = 4) to minor storm conditions (K Dourbes = 5) are possible in the
second half of December 20 in view of the expected CME arrival.

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Daily estimated sunspot number

Most recent alerts

2014 Dec 17 0852 UTC
An M8.7 flare occurred on December 17 with peak time 04:51 UT. It was preceded [more]

2014 Dec 14 1649 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

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

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