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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Dec 27 1229 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
27 Dec 2014	130	013
28 Dec 2014	130	009
29 Dec 2014	125	008

Bulletin

Several C-class flares and one M-class flare were observed during the past period. Flaring activity mainly originated from NOAA active region 2249 (no Catania number yet). The strongest was an M2.3 flare peaking at 2:16 UT on December 27. No Earth-directed CMEs were observed. More C-flares are expected, with a light chance for an isolated M-class flare. The solar wind speed was fluctuating in the range between 350 and 560 km/s with current values near 450 km/s. The magnitude of the interplanetary magnetic field was around 10 nT for the first half of the period and decreased later on to 5 nT. Geomagnetic activity reached active levels (K=4) at local (at Dourbes) and global levels (NOAA estimated Kp). Quiet to unsettled geomagnetic conditions are expected, with some chance for active conditions. TODAY'S ESTIMATED ISN : ///, BASED ON /// STATIONS.

Solar indices for 26 Dec 2014

Wolf number Catania	///
10cm solar flux	137
AK Chambon La Forêt	023
AK Wingst	017
Estimated Ap	016
Estimated international sunspot number	061 - Based on 12 stations

Noticeable events summary

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

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