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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2024 Apr 11 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
11 Apr 2024	133	003
12 Apr 2024	135	018
13 Apr 2024	137	014

Solaraktive Regionen und Flares

Solar flaring activity over the last 24 hours has been low, with multiple C-class flares. The strongest activity was a C3.5 flare associated with NOAA AR 3635 (beta), peaking at 11:10 UTC. There are currently four active regions on the solar disk with NOAA AR 3633 (beta-gamma) being the most complex one. NOAA AR 3632 has decayed into plage. The solar flaring activity is expected to be at low levels over the next 24 hours, with C-class flares probable.

Koronaler Massenauswurf

No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph observations in the last 24 hours. A filament eruption was observed on SDO/AIA 304 data at 06:30 UTC near the central meridian. It will be analysed when coronograph observations become available.

Koronale Löcher

The small, patchy, mid-latitude (south hemisphere), negative polarity coronal hole that was reported on April 9th and 10th has crossed the central meridian. A related high-speed stream is expected to arrive on April 12th. The small, positive polarity, mid-latitude (northern hemisphere) coronal hole that was reported on April 10th continues to reside on the central meridian. A related high-speed stream is expected to arrive on April 13th.

Sonnenwind

The Earth is inside the slow solar wind, with speed values ranging from 406 km/s to 492 km/s and an interplanetary magnetic field around 7nT. The Bz component varied between -6 nT and 7 nT. The interplanetary magnetic field phi angle was predominantly in the positive sector. Possible enhancements in the solar wind speed, due to a high-speed stream associated with the negative polarity coronal hole, may be expected over the next 24 hours.

Geomagnetismus

Geomagnetic conditions were globally and locally at quiet or unsettled levels (NOAA Kp and K BEL 0 to 3). Active conditions are expected over the next 24 hours due to the influence from the negative polarity coronal hole.

Protonenflusswerte

The greater than 10 MeV proton flux was below the threshold level over the past 24 hours and is expected to remain so for the next 24 hours.

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux was below the threshold level in the last 24 hours and is expected to remain so in the coming 24 hours. The 24h electron fluence is presently at normal levels and is expected to remain so in the coming 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 090, basierend auf 12 Stationen.

Solarindizes für den 10 Apr 2024

Wolf-Zahl Catania	069
10cm Solarflux	131
AK Chambon La Forêt	012
AK Wingst	009
Geschätzer Ap-Wert	008
Geschätzte internationale Sonnenfleckenzahl	056 - Basierend auf 17 Stationen

Zusammenfassung auffälliger Ereignisse

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

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