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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2021 Jun 04 1240 UTC

Vorhersage des SIDC

Sonneneruptionen

C-class flares expected, (probability >=50%)

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
04 Jun 2021	075	003
05 Jun 2021	075	004
06 Jun 2021	075	003

Bulletin

The solar activity was quiet over the past 24 hours, with the GOES X-ray flux remaining below C-level. The bipolar sunspot group (Catania sunspot group 1, NOAA-AR 2827) remained mostly stable and produced very few B-class flares. The sunspot region (Catania sunspot group 2, NOAA-AR 2829) turned to a bipolar region (from alpha to beta magnetic configuration) and produced several B-class flares. The solar activity is expected to remain quiet for the next 24 hours with a small probability to produce C-class flare.

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 and is expected to remain so during the next 24 hours. The 24h electron fluence was at normal levels in the last 24 hours and is expected to stay at normal levels for the next 24 hours.

The solar wind parameters (as observed by ACE and DSCOVR) showed an ambient background and slow solar wind speed regime. The solar wind speed ranged between 280 km/s to 320 km/s. The interplanetary magnetic field magnitude was slightly more elevated reaching 8 nT, and Bz components varied between -5.3 nT and 6.3 nT. The high-speed stream associated with the equatorial coronal hole (that reached the central meridian on May 31) may still impact the solar condition near Earth later today or tomorrow.

The geomagnetic conditions were mostly quiet over the past 24 hours (NOAA- Kp: 0-2, and K-Dourbes: 0-3). The conditions may become more active with the arrival of the high-speed streams from the equatorial coronal hole (that reached the central meridian on May 31) later today or tomorrow.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 032, basierend auf 21 Stationen.

Solarindizes für den 03 Jun 2021

Wolf-Zahl Catania	035
10cm Solarflux	076
AK Chambon La Forêt	010
AK Wingst	///
Geschätzer Ap-Wert	008
Geschätzte internationale Sonnenfleckenzahl	030 - Basierend auf 31 Stationen

Zusammenfassung auffälliger Ereignisse

Zur Verfügung gestellt vom Solar Influences Data Analysis Center© - SIDC - Verarbeitet von SpaceWeatherLive

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