Viewing archive of Tuesday, 9 April 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Apr 09 1257 UTC

SIDC Forecast

Solar flares

Eruptive (C-class flares expected, probability >= 50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
09 Apr 2013	140	007
10 Apr 2013	142	003
11 Apr 2013	143	004

Bulletin

Nine sunspot groups were reported by Catania today. Only one of them (Catania number 43, NOAA AR 1719) has beta-gamma configuration of the photospheric field. This sunspot group, as well as Catania sunspot groups 32, 34, and 40 (NOAA ARs 1713, 1714, and 1718 respectively) that produced flaring activity at a low C-level during the past 24 hours, have the potential to produce C-class flares. An M-class flare is possible, although not very likely. The filament eruption observed by SDO/AIA around 13:46 UT on April 8 was most probably confined as it was not associated with a CME observed by SOHO or STEREO. The Earth is currently inside a slow (around 350 km/s) solar wind flow with average (5-6 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.

Today's estimated international sunspot number (ISN): 088, based on 08 stations.

Solar indices for 8 Apr 2013

Wolf number Catania	///
10cm solar flux	139
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	001
Estimated international sunspot number	089 - Based on 16 stations

Noticeable events summary

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

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