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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Oct 01 1234 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
01 Oct 2014	155	015
02 Oct 2014	150	017
03 Oct 2014	147	017

Bulletin

Only one C-class flare was observed during the period. This C6.7 flare was located in NOAA 2172 and peaked at 03:06UT. The other 8 sunspot groups have been quiet. NOAA 2178 seems to be the most complex, with opposite magnetic polarities close to each other but no apparent delta structure. A CME first observed by LASCO at 08:48UT on 01 October was associated to a prominence eruption near the east limb. It is not Earth directed. The x-ray background flux is still above the C1-level. Two 20-degrees long filaments visible in the western solar hemisphere have remained quiet. C-class flaring is expected, with still a chance on an isolated M-class flare. Solar wind speed varied between 350 and 400 km/s, with peaks near 450 km/s. Bz fluctuated between -7 and +5 nT. A few isolated active periods were recorded. Geomagnetic conditions are expected to be quiet to unsettled, with isolated active periods possible.

Today's estimated international sunspot number (ISN): 103, based on 12 stations.

Solar indices for 30 Sep 2014

Wolf number Catania	185
10cm solar flux	162
AK Chambon La Forêt	023
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	/// - Based on /// stations

Noticeable events summary

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

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