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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2021 Jul 08 1232 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
08 Jul 2021	073	005
09 Jul 2021	071	011
10 Jul 2021	070	008

Bulletin

Solar activity was at very low levels. NOAA Active Region (AR) 2837 produced a long duration B6.8 flare at 1546 UT with an associated westward eruption, but has since decayed into a plage region. NOAA AR 2839 was inactive. NOAA AR 2840 was also inactive and is about to rotate over the west solar limb. Solar activity is expected to be very low over the next 24 hours, with a low probability of C-class flares.

No Earth directed Coronal Mass Ejections (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 remain below this level during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

The Earth is currently under the influence of the slow solar wind. The solar wind speed varied between 300 and 350 km/s. The magnetic field was slightly enhanced with values up to 9 nT. The Bz varied between -6 and +4 nT. The interplanetary magnetic field phi angle was predominantly in the positive sector (directed away from the Sun). The solar wind conditions are expected to continue to reflect a slow solar wind regime for the next 24 hours, with a possible slight enhancement in the solar wind speed on Jul 09 due to the influence from a small positive polarity coronal hole that crossed the central meridian on Jul 06.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-2 and local K Dourbes 1-3) over the past 24 hours. Geomagnetic conditions are expected to be quiet to unsettled over the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 019, basierend auf 18 Stationen.

Solarindizes für den 07 Jul 2021

Wolf-Zahl Catania	018
10cm Solarflux	076
AK Chambon La Forêt	013
AK Wingst	008
Geschätzer Ap-Wert	007
Geschätzte internationale Sonnenfleckenzahl	020 - Basierend auf 25 Stationen

Zusammenfassung auffälliger Ereignisse

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

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