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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2013 Jan 22 1236 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
22 Jan 2013	109	002
23 Jan 2013	110	003
24 Jan 2013	113	003

Bulletin

NOAA AR 1660 (Catania sunspot groups 70 and 71) continues to to grow and develop magnetic complexity (currently beta-gamma configuration of its photospheric magnetic field). We expect C-class flares from this active region. A low-latitude coronal hole in the southern hemisphere reached solar central meridian. The corresponding fast solar wind stream will probably arrive at the Earth on January 25, possibly resulting in active geomagnetic conditions. The Earth is currently inside a slow (around 320 km/s) solar wind flow with weak (around 3 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 035, based on 08 stations.

Solar indices for 21 Jan 2013

Wolf number Catania	///
10cm solar flux	108
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	029 - Based on 08 stations

Noticeable events summary

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

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