Vaata esmaspäev, 30 detsember 2013 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2013 Dec 30 1146 UTC

SIDC Forecast

Valid from 1230 UTC, 30 Dec 2013 until 01 Jan 2014
Päikesepursked ehk loited

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Päikese prootonid

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

10cm fluxAp
30 Dec 2013138007
31 Dec 2013136007
01 Jan 2014134020

Bulletin

Several C-class flares occurred since our last bulletin, all originating in NOAA AR 11936. The largest one was a C5.4 flare peaking at 19:30 UT on December 29. We expect more C-class flares in the coming 24h. There is also a good chance (around 50%) for an M-class flare. Due to its location close to the west limb and the fact that NOAA AR 11934 is still showing flux emergence and associated activity, we issue a warning condition for a proton event in case a strong flare occurs in this active region. CACTUS reported the detection of a partial halo CME at 07:12 UT on December 29. This CME originated near NOAA AR 11938. Coronagraph images from LASCO/C2 and STEREO-B/COR2 show that this is a very slow event (around 180 km/s) which is mostly southward directed. We do not expect geomagnetic effects from this eruption. The leading edge of a recurrent coronal hole has crossed the central meridian. This coronal hole has grown compared to the previous rotation. At that time, the associated fast wind stream caused a geomagnetic storm (Kp up to 6, K_Dourbes up to 5). The solar wind speed has decreased further to 300 km/s and the total strength of the magnetic field lies around 6 nT. Current geomagnetic conditions are quiet. We expect them to remain so until late on January 1, when we foresee the arrival of a coronal hole wind stream. Minor storm conditions (K_Dourbes up to 5) are expected.

Today's estimated international sunspot number (ISN): 068, based on 10 stations.

Solar indices for 29 Dec 2013

Wolf number Catania///
10cm solar flux137
AK Chambon La Forêt007
AK Wingst005
Estimated Ap003
Estimated international sunspot number087 - Based on 29 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

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