Viewing archive of Saturday, 13 November 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Nov 13 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
13 Nov 2021	085	003
14 Nov 2021	084	004
15 Nov 2021	082	004

Bulletin

Over the past 24 hours the solar activity was at low levels with one impulsive C-class flare. Active regions NOAA 2893 (alpha) and NOAA 2895 (beta) remained stable and inactive. Active region NOAA 2894 developed trailing spots and increased its underlying photospheric magnetic complexity from type alpha to type beta-gamma. It produced a C1.2-class flare (peak time 08:43 UTC on Nov 13th) and is expected to be the source of more C-class flaring over the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) were observed in available coronagraph imagery.

Over the past 24 hours the greater than 10 MeV proton flux was at background levels and is expected to remain so in the next 24 hours. The greater than 2MeV electron was under the 1000 pfu threshold and is expected to remain so for the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) remained at background slow solar wind conditions. The solar wind speed was rather steady with an average value of 357 km/s. The interplanetary magnetic field was weak with a maximum of 5.5 nT. The Bz component was very weak with a minimum value of -2.4 nT. The interplanetary magnetic was in the negative sector for the entire period. The solar wind parameters are expected to remain at background solar wind conditions over the next 24 hours.

The geomagnetic conditions over the past 24 hours were quiet and are expected to remain quiet with possible isolated unsettled periods.

Today's estimated international sunspot number (ISN): 028, based on 09 stations.

Solar indices for 12 Nov 2021

Wolf number Catania	///
10cm solar flux	083
AK Chambon La Forêt	004
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	036 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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