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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2025 Jul 30 1231 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sluneční protony

Quiet

	10cm tok	Ap
30 Jul 2025	154	016
31 Jul 2025	156	018
01 Aug 2025	158	015

Slunečně aktivní oblasti a vzplanutí

Solar flaring activity was at low levels with low C-class flaring over the past 24 hours. A total of 11 numbered sunspot groups were identified on the visible solar disk. The most notable activity was a C3.7 flare (SIDC Flare 4962) with peak time 22:05 UTC on July 29, produced by a region behind the north-west limb. SIDC Sunspot Group 572 (NOAA Active Region 4155) classified as magnetic type beta has exhibited some growth and was responsible for most of the on-disc flaring activity over the past 24 hours with some contributions from SIDC Sunspot Group 539 (NOAA Active Region 4157). The remaining active regions on the visible solar disc have been mostly quiet. The solar flaring activity is expected to increase to moderate levels over the next 24 hours with likely M-class flaring.

Vyhazování koronální hmoty

No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery.

Solární bouře

Over the past hours the solar wind parameters as measured by ACE have registered some enhancements, possibly indicating the expected connection to a high-speed stream from a negative polarity coronal hole. The magnitude of the interplanetary magnetic field (B) reached 12.8 nT with a minimum Bz of -5.2 nT. The solar wind speed reached 500 km/s. The B field phi angle was entirely in the negative sector (directed towards the Sun). Enhanced solar wind conditions are expected to continue over the next two days.

Geomagnetismus

The geomagnetic conditions over the past 24 hours were quiet to unsettled. Quiet to active geomagnetic conditions are expected for the next 48 hours with possible isolated minor storms intervals related to the expected influence of a high speed stream arrival.

Úrovně protonového toku

Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain at nominal levels over the next days.

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV electron flux as measured by GOES 18 has briefly exceeded the 1000 pfu threshold over the last 24 hours, while the greater than 2 MeV electron flux as measured by GOES 19 remained below the 1000 pfu threshold. The greater than 2 MeV electron flux is expected to be predominantly below the 1000 pfu threshold in the next 24 hours, though it might increase again over the next days with the expected high speed stream arrival. The 24-hour electron fluence was at nominal levels and is expected to remain so in the next 24 hours.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 148, na základě 23 stanic.

Solární indexy za 29 Jul 2025

Wolfovo číslo Catania	///
10cm sluneční tok	152
AK Chambon La Forêt	010
AK Wingst	008
Odhadovaný Ap	008
Odhadovaný mezinárodní počet slunečních skvrn	133 - Na základě 26 stanic

Souhrn významných událostí

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

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