Viewing archive of Monday, 7 December 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Dec 07 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
07 Dec 2015	103	019
08 Dec 2015	104	018
09 Dec 2015	105	013

Bulletin

Solar activity remains to be low, with only two low C-class flares reported in the past 24 hours. The C1.1 flare observed at the East solar limb this morning (peaking at 04:19 UT) was associated with the coronal EUV wave and rather narrow CME. We do not expect significant change in the level of the solar activity. Low C-class flares are possible in the coming hours. No Earth directed CMEs were observed in the last 24 hours. The Earth is currently inside of the fast flow associated with the strongly extended northern polar coronal hole. During last 36 hours the solar wind speed is slowly increasing, with the current value of about 640 km/s. The interplanetary magnetic field magnitude is slightly elevated and it amounts about 14 nT. We expect further increase of the solar wind speed which, together with the possibly negative values of the Bz component of the interplanetary magnetic field, might induce active to minor storm geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 056, based on 14 stations.

Solar indices for 06 Dec 2015

Wolf number Catania	///
10cm solar flux	102
AK Chambon La Forêt	037
AK Wingst	023
Estimated Ap	027
Estimated international sunspot number	049 - Based on 22 stations

Noticeable events summary

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

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