Viewing archive of Wednesday, 10 April 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Apr 10 1150 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
10 Apr 2013	149	005
11 Apr 2013	151	003
12 Apr 2013	150	004

Bulletin

Catania sunspot group 40 (NOAA AR 1718) is the only group that produced C-class flares during the past 24 hours, all of them being below the C2 level. This sunspot group, as well as Catania sunspot group 43 (NOAA AR 1719), maintain beta-gamma configuration of the photospheric magnetic field. Together with two rapidly emerging sunspot groups in the south-east quadrant (Catania number 44 and another group that is still not numbered), these active regions are expected to provide flaring activity on the C-level. An M-class flare is possible but not very likely. The Earth is currently inside a slow (around 350 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.

Today's estimated international sunspot number (ISN): 096, based on 06 stations.

Solar indices for 9 Apr 2013

Wolf number Catania	147
10cm solar flux	147
AK Chambon La Forêt	007
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	095 - Based on 16 stations

Noticeable events summary

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

All times in UTC

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