Viewing archive of Wednesday, 6 February 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Feb 06 1208 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
06 Feb 2013	105	010
07 Feb 2013	103	012
08 Feb 2013	100	005

Bulletin

Four C-class flares were detected during last 24 hours. The C-class flares are possible, in particular from the Catania sunspot group 79 (NOAA AR 1667). The strongest observed flare was C8.7 flare peaking at 00:21 UT, on February 6. The long duration flare originated from the Catania sunspot group 79 (NOAA AR 1667) and was associated with the type II radio burst and the CME. Due to the data gap it is not possible to determine when the CME first time appeared in the SOHO/LASCO C2 field of view. The C1.3 flare peaking at 03:16 UT on February 6, was associated with the partial halo CME. From the currently available data it seems that the CME was directed somewhat northward of the Sun-Earth line. Therefore, only arrival of a CME-driven shock at the Earth is expected. The additional information will be possible once the data are available. The interplanetary magnetic field magnitude is about 4 nT. The solar wind speed is still low, having value of about 320 km/s. The fast flow from the small low-latitude coronal hole in the southern hemisphere might arrive on February 9. The fast flow associated with the low-latitude coronal hole in the northern hemisphere should arrive today. We expect quiet to possibly active geomagnetic conditions in the next 48 hours.

Today's estimated international sunspot number (ISN): 029, based on 08 stations.

Solar indices for 5 Feb 2013

Wolf number Catania	///
10cm solar flux	105
AK Chambon La Forêt	004
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	027 - Based on 16 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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