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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2024 Dec 06 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
06 Dec 2024	175	007
07 Dec 2024	173	012
08 Dec 2024	169	031

Solaraktive Regionen und Flares

Solar flaring activity was at moderate levels, with multiple C-class flares and one M-class flare recorded over the past 24 hours. The largest flare was an M1.2 flare (SIDC Flare 2818), peaking on December 06 at 09:20 UTC, associated with SIDC Sunspot Group 288 (NOAA Active Regions 3917; beta-gamma). There are currently seven numbered active regions visible on the solar disk. SIDC Sunspot Group 288 and SIDC Sunspot Group 330 (NOAA Active Region 3916; beta-gamma) are currently the most complex regions on the disk and were responsible for the most of the flaring activity observed during this period together with Group 323 (NOAA Active Region 3906), that has rotated behind the west limb. Low flaring activity was also produced by SIDC Sunspot Group 305 (NOAA Active Region 3912; beta). Other regions on the disc have simple configuration of their photospheric magnetic field (alpha and beta) and have not shown any significant flaring activity. Solar flaring activity is expected to be at moderate levels over the next 24 hours, with C-class flares very likely and M-class flares possible.

Koronaler Massenauswurf

No Earth-directed coronal mass ejections (CMEs) have been detected in the available coronagraph imagery over the past 24 hours.

Koronale Löcher

A positive polarity mid-latitude coronal hole (SIDC Coronal Hole 60) has been crossing the central meridian since December 4. Another positive polarity coronal hole in the northern hemisphere, SIDC Coronal Hole 82, reached the central meridian today, December 6.

Sonnenwind

Over the past 24 hours, the solar wind parameters (ACE and DSCOVR) reflected slow solar wind conditions. The solar wind speed decreased from 420 km/s to values about 370 km/s. The interplanetary magnetic field remained below 7 nT. The southward component of the interplanetary magnetic field fluctuated between -5 nT and 6 nT. The interplanetary magnetic field orientation was predominantly in the negative sector (field directed towards the Sun). Slow solar wind conditions are expected to prevail during the next days, with a chance of a weak enhancement on Dec 07-08 due to possible arrival of a high-speed stream from a positive polarity coronal hole, that started to cross the central meridian on Dec 04.

Geomagnetismus

Geomagnetic conditions over the past 24 hours were quiet to unsettled globally (NOAA Kp: 1 to 3-) and quiet locally over Belgium (K-Bel: 1 to 2). Quiet to unsettled geomagnetic conditions are expected over the next days, with a chance of isolated active periods on December 7-8 due to the possible arrival of a high-speed stream (HSS).

Protonenflusswerte

The greater than 10 MeV GOES proton was below the 10 pfu threshold over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Elektronenflüsse im geostationären Orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, remained below the 1000 pfu alert threshold, and it is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain at these levels.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 113, basierend auf 10 Stationen.

Solarindizes für den 05 Dec 2024

Wolf-Zahl Catania	///
10cm Solarflux	175
AK Chambon La Forêt	008
AK Wingst	004
Geschätzer Ap-Wert	004
Geschätzte internationale Sonnenfleckenzahl	130 - Basierend auf 10 Stationen

Zusammenfassung auffälliger Ereignisse

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

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