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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Dec 08 1211 UTC

SIDC Forecast

Brillamenti solari

Eruptive (C-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
08 Dec 2014	140	006
09 Dec 2014	145	007
10 Dec 2014	150	007

Bulletin

The background of the Xray flux (measured by GOES) is currently at the higher B-level. Only 3 minor C-class flares were observed, originating from NOAA AR 2222 (Catania group 24) and 2231 (no Catania number yet). NOAA 2231 emerged yesterday and developed to a beta region. Flaring at the lower C-level is expected. As NOAA 2222 is approaching the west limb, despite the reduced flaring potential, an eruption might still be accompanied by an increased solar proton flux. No Earth directed CMEs were observed. The Earth is still inside a fast flow, but with decreasing solar wind speed values (from 800 to 600 km/s, measured by ACE). The interplanetary magnetic field has a magnitude between 3 and 7 nT with a fluctuating Bz component. Yesterday afternoon (UT time), active to minor storm conditions were reached (to 5 for local K at Dourbes and estimated NOAA Kp) due to the arrival of a coronal hole high speed stream. K returned to quiet conditions again. Quiet to unsettled magnetic conditions are expected.

Today's estimated international sunspot number (ISN): 043, based on 11 stations.

Solar indices for 07 Dec 2014

Wolf number Catania	///
10cm solar flux	132
AK Chambon La Forêt	037
AK Wingst	031
Estimated Ap	031
Estimated international sunspot number	042 - Based on 09 stations

Noticeable events summary

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

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