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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Oct 27 1226 UTC

SIDC Forecast

Brillamenti solari

Major flares expected (X-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

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

	10cm flux	Ap
27 Oct 2014	215	014
28 Oct 2014	210	006
29 Oct 2014	205	005

Bulletin

Catania sunspot group 88 (NOAA AR 2192) remains very active and, since the previous bulletin, produced eight M-class flares and about ten C-class flares. The strongest was an M7.1, peaking at 00:34 UT today. For none of these flares an associated Earth-bound CME was observed. The region retains its area and magnetic complexity and is expected to produce additional flares up to the X-level. Due to it's current location, a major eruption from Catania group 88 may result in a rise of the proton flux. A long filament in the northern hemisphere is continuing its passage across the solar central meridian. Its possible eruption may lead to an Earth- directed CME. ACE observations indicate a slow solar wind, with a speed ranging between 350 and 450 km/s. The interplanetary magnetic field magnitude reaches values up to 8 nT. Mostly quiet geomagnetic conditions are observed and are expected to continue with potentially an isolated time slot of active (K=4) conditions.

Today's estimated international sunspot number (ISN): 082, based on 13 stations.

Solar indices for 26 Oct 2014

Wolf number Catania	///
10cm solar flux	217
AK Chambon La Forêt	019
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	101 - Based on 15 stations

Noticeable events summary

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

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