Viewing archive of Thursday, 21 February 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Feb 21 1156 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
21 Feb 2013	110	005
22 Feb 2013	110	004
23 Feb 2013	110	004

Bulletin

Solar activity has been eruptive the last 24h featuring 6 C flare with the highest a C 8.2 flare peaking at February 20th 11:11 UT. All flaring activity came from AR Catania 95 (NOAA 11678). Flaring activity is expected to remain active especially from this AR which has a Beta-Gamma-Delta magnetic configuration. Solar wind speed is at 400 km/s and the IMF Bz component is low between -5 nT and 5 nT. Geomagnetic activity has been quiet to moderate and is expected to remain so for the next 48h.

Today's estimated international sunspot number (ISN): 050, based on 07 stations.

Solar indices for 20 Feb 2013

Wolf number Catania	///
10cm solar flux	114
AK Chambon La Forêt	014
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	071 - Based on 26 stations

Noticeable events summary

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

All times in UTC

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