Viewing archive of Saturday, 21 November 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Nov 21 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
21 Nov 2015	111	006
22 Nov 2015	112	007
23 Nov 2015	112	007

Bulletin

Solar activity was low with only a single C flare originating from Catania group 80 (NOAA region 2457) peaking at C1.6 level at 2:14UT. Some new flux emerge occurred in the leading part of Catania group 77 (NOAA 2454) while the other regions were fairly stable. The occurrence of further occasional C flaring is quite possible over the next period. No Earth directed CMEs were observed in available coronagraph images.

Solar wind speed was in the 370-430 km/s range with total magnetic field increasing to a peak of 9.6 nT in the first half of the period before restoring to values of around 5 nT. Bz was mostly positive with a dip down to -5 nT before midnight. Geomagnetic conditions were quiet (local K Dourbes 1-2) with only a period of unsettled conditions at planetary level (NOAA Kp 0-3). Nominal wind conditions and associated quiet geomagnetic conditions are expected to continue.

Today's estimated international sunspot number (ISN): 056, based on 11 stations.

Solar indices for 20 Nov 2015

Wolf number Catania	083
10cm solar flux	111
AK Chambon La Forêt	008
AK Wingst	002
Estimated Ap	003
Estimated international sunspot number	055 - Based on 18 stations

Noticeable events summary

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

All times in UTC

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