Prohlížíte si archiv pátek 30. července 2021

Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2021 Jul 30 1231 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
30 Jul 2021	075	004
31 Jul 2021	076	005
01 Aug 2021	078	005

Bulletin

The visible solar disc is spotless and the X-ray flux is below B-level. The solar activity is expected to remain at low levels over the next 24 hours.

No Earth directed Coronal Mass Ejection (CME) has 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 was below the 1000 pfu threshold in the past 24 hours. The greater than 2 MeV electron flux may slightly increase during the next 24 hours due to the high-speed streams. The 24h electron fluence was at normal levels in the last 24 hours and may also slightly increase for the next 24 hours.

The solar wind parameters (as observed by ACE and DSCOVR) show some indications of a slow return towards an ambient background and slow solar wind speed regime. Solar wind speed decreased from 570 to near about 450 km/s. Total interplanetary magnetic field strength remained below 7 nT. The Bz component underwent only weak deviations (between -4 nT and +4 nT), with no prolonged period of southward direction. The solar wind conditions are expected to continue it slow returned toward a slow solar wind speed regime. The solar wind may be temporarily slightly enhanced later on July 30 due to some possible effect of the arrival of the coronal mass ejection observed on July 27 at 03:24 UTC (with a projected speed of 388 km/s).

The geomagnetic conditions were quiet over the past 24 hours. The conditions are expected to remain mostly quiet as the Earth is expected to remain in the mostly slow solar wind speed regime for the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 000, na základě 24 stanic.

Solární indexy za 29 Jul 2021

Wolfovo číslo Catania	013
10cm sluneční tok	076
AK Chambon La Forêt	013
AK Wingst	012
Odhadovaný Ap	011
Odhadovaný mezinárodní počet slunečních skvrn	002 - Na základě 33 stanic

Souhrn významných událostí

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

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