Het archief bekijken van donderdag 28 oktober 2021

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2021 Oct 28 1231 UTC

SIDC Prognose

Zonnevlammen

M-class flares expected (probability >=50%)

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
28 Oct 2021	112	002
29 Oct 2021	100	001
30 Oct 2021	090	007

Bulletin

Solar flaring activity was moderate during the last 24 hours, with two M-class and several C-class flares detected. NOAA Active Region (AR) 2887 produced an M1 flare today at 07:30 UT and an M2 flare today at 10:37 UT. It also produced numerous C-class flares during the last 24 hours. NOAA AR 2891 produced a few C1 and C2 flares during the last 24 hours. One or more M-class flares are likely for the next 24 hours, with a remote possibility for an X-class flare.

No Earth-directed CMEs have so far being seeing in coronograph images. However, geo-effective CMEs might be detected in the next 24 hours as images from satellite coronographs (such as SOHO/LASCO-C2 and STEREO/Cor2) will become available. This is because of the flaring activity of the last few hours that can be seen in EUV imagers.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold and is expected to remain below this threshold during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

The solar wind speed (as measured by DSCOVR) dropped gradually from 420 to 290 km/s during the last 24 hours. The total magnetic field decreased from 9 nT to 1 nT, while the Bz varied between -5 and +6 nT in the last 24 hours. The interplanetary magnetic field phi angle was predominantly in the negative sector (directed towards the Sun) during the last 24 hours. The solar wind conditions are expected to remain in the slow solar wind regime for the next 24 hours.

Geomagnetic conditions were globally and locally quiet (NOAA Kp 0-1 and K Dourbes 0-2) during the last 24 hours. Geomagnetic conditions are expected to remain quiet in the next 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 093, gebaseerd op 23 stations.

Zon indexen voor 27 Oct 2021

Wolfgetal Catania	///
10cm zonneflux	111
AK Chambon La Forêt	005
AK Wingst	003
Geschatte Ap	002
Geschat internationaal zonnevlekkengetal	099 - Gebaseerd op 23 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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