Viewing archive of Saturday, 12 December 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Dec 12 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
12 Dec 2015	116	013
13 Dec 2015	118	011
14 Dec 2015	120	010

Bulletin

Solar activity is low. The strongest flare, out of 6 C-class flares reported in the last 24 hours, was the C5.6 flare (peaking at 17:16 UT on December 11), which originated from the NOAA AR 2465, at that moment situated close to the center of the solar disc. The flare and associated with the EIT wave and the coronal dimming, on-disc signatures of the CME. More information will be reported as soon as coronagraph data become available. We expect C-class flares in the coming hours. The coronagraph data, which became recently available, show that the C3.9 flare on December 10 and C1.4 flare on December 11 (mentioned in the last two reports) were associated with narrow, slow and not Earth directed CMEs.

The solar wind speed is currently about 560 km/s and the interplanetary magnetic field magnitude is 5 nT. The geomagnetic conditions are quiet to unsettled and we expect it to remain so in the coming hours.

Today's estimated international sunspot number (ISN): 075, based on 11 stations.

Solar indices for 11 Dec 2015

Wolf number Catania	099
10cm solar flux	114
AK Chambon La Forêt	037
AK Wingst	027
Estimated Ap	027
Estimated international sunspot number	079 - Based on 14 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page