Viewing archive of Monday, 21 January 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jan 21 1232 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 Jan 2013	106	003
22 Jan 2013	105	004
23 Jan 2013	107	003

Bulletin

Three sunspot groups are reported by NOAA today: NOAA ARs 1654, 1658 (Catania numbers 64 and 69 respectively), and 1660 (no Catania number yet). A C-class flare is possible in the newly emerged NOAA AR 1660. The Earth is currently inside a slow (around 350 km/s) solar wind flow with weak to average (3-4 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.

Today's estimated international sunspot number (ISN): 035, based on 03 stations.

Solar indices for 20 Jan 2013

Wolf number Catania	///
10cm solar flux	107
AK Chambon La Forêt	014
AK Wingst	011
Estimated Ap	011
Estimated international sunspot number	031 - Based on 06 stations

Noticeable events summary

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

All times in UTC

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