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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2021 Nov 14 1232 UTC

SIDC Forecast

Sluneční erupce

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
14 Nov 2021	079	004
15 Nov 2021	077	004
16 Nov 2021	078	005

Bulletin

The solar activity was at very low levels over the past 24 hours with low B-class flaring. Active region NOAA 2895 has now rotated behind the west limb. NOAA 2894 has undergone a decay, losing its trailing spot, and is now classified as magnetic-type beta. It has been inactive and so was NOAA 2893 (alpha). The solar activity is expected to be at very low to low levels with a slight chance for C-class flaring from NOAA 2894 over the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) were observed in the 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 has shortly crossed the 1000 pfu threshold and might briefly cross the 1000 pfu threshold again in the next 24 hours. The 24h electron fluence was at the border of nominal to moderate levels and is expected to remain so in the next 24 hours.

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) remained at background slow solar wind conditions. The solar wind speed varied between 299 km/s and 360 km/s. The interplanetary magnetic field was weak with a maximum of 5.5 nT. The north-south Bz component varied between -4.5 nT and 3.6 nT. The interplanetary magnetic remained predominantly in the negative sector. 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 mostly quiet until Nov 17th. Then unsettled to active conditions with possible minor storm intervals are expected due to a foreseen high speed stream arrival from a large negative-polarity mid- latitude coronal hole, which crossed the central meridian last night.

Today's estimated international sunspot number (ISN): 021, based on 08 stations.

Solar indices for 13 Nov 2021

Wolf number Catania	///
10cm solar flux	081
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	025 - Based on 16 stations

Noticeable events summary

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

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