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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Dec 26 1209 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
26 Dec 2014	138	016
27 Dec 2014	130	011
28 Dec 2014	130	009

Bulletin

Only a handful (mainly) lower C-class flares erupted during the past 24 hours, while the background of the Xray flux is at the higher B-level. The main event was a C4.3 flare, originating from Catania sunspot region 46 (NOAA active region 2448). NOAA 2249 (no Catania number yet) is the other region that is producing some flares. No Earth-directed CMEs were observed. Flaring at the C-level is expected to continue. Earth is inside a stable solar wind, with a speed near 450 km/s. The magnitude of the interplanetary magnetic field obtains values between 7 and 10 nT, with a mainly negative Bz component till -9 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, due to effects of a coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 064, based on 08 stations.

Solar indices for 25 Dec 2014

Wolf number Catania	///
10cm solar flux	145
AK Chambon La Forêt	026
AK Wingst	013
Estimated Ap	013
Estimated international sunspot number	069 - Based on 24 stations

Noticeable events summary

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

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