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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2021 Oct 22 1235 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm tok	Ap
22 Oct 2021	083	006
23 Oct 2021	084	005
24 Oct 2021	085	006

Bulletin

Solar activity was at very low levels. NOAA Active Region (AR) 2886 (Catania sunspot region 64) remained stable. Catania sunspot region 65 has decayed and has been inactive. A new region (as yet unnumbered) has begun to rotate onto the solar disk (S24E75) and is producing B-level flaring activity. Solar activity is expected to be very low over the next 24 hours with a small probability of C-class flares, particularly from the new active region rotating onto the solar disk.

No Earth directed CMEs have been detected in the available coronagraph imagery.

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 increase slightly but 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 (DSCOVR) decreased over the period from 530 to 430 km/s. The total magnetic field fluctuated around 5nT. The Bz varied between -3 and +4 nT. The interplanetary magnetic field phi angle was predominantly in the negative sector (directed towards from the Sun). The solar wind speed is expected to continue to decrease over Oct 22 and reflect a slow solar wind regime from Oct 23 as the influence of the high speed stream wanes.

Geomagnetic conditions were at quiet levels with one unsettled period recorded locally at Dourbes (NOAA Kp and local K Dourbes recorded values of 0-2 and 0-3, respectively). Geomagnetic conditions are expected to be quiet to unsettled on Oct 22 and Oct 23.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 035, na základě 21 stanic.

Solární indexy za 21 Oct 2021

Wolfovo číslo Catania	025
10cm sluneční tok	082
AK Chambon La Forêt	010
AK Wingst	006
Odhadovaný Ap	007
Odhadovaný mezinárodní počet slunečních skvrn	016 - Na základě 31 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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