Viewing archive of Thursday, 29 August 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Aug 29 1221 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
29 Aug 2013	109	004
30 Aug 2013	110	014
31 Aug 2013	111	017

Bulletin

There was 1 C-class flare (C1.3) in the past 24 hours originating from AR NOAA 11836. AR NOAA 11835 has grown more complex and could produce an M-class flare. Solar wind speed is around 380 km/s and the interplanetary magnetic field Bz component around 0 nT. Geomagnetic conditions where quiet, but are expected to reach active (K=4) to minor storm (k=5) levels in the evening of August 30th due to the arrival of the fast stream of a coronal hole.

Today's estimated international sunspot number (ISN): 034, based on 12 stations.

Solar indices for 28 Aug 2013

Wolf number Catania	///
10cm solar flux	108
AK Chambon La Forêt	007
AK Wingst	008
Estimated Ap	009
Estimated international sunspot number	034 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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