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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2024 Dec 18 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
18 Dec 2024	170	007
19 Dec 2024	170	026
20 Dec 2024	170	016

Solaraktive Regionen und Flares

A total of 5 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C8.2 flare (SIDC Flare 3004) peaking at 07:34 UTC, from an AR rotating into view from the east limb.

Koronaler Massenauswurf

No Earth directed CMEs were observed in the last 24 hours. A backsided full halo CME was observed at 16:00 UTC on 17 December, it will not arrive to the Earth.

Sonnenwind

The solar wind at Earth is still disturbed from the 17 December ICME arrival, with solar wind speeds around 650 km/s (SOHO CELIAS) and interplanetary magnetic field around 8 nT (DSCOVR). A slow return into solar wind conditions is expected for the next hours, and a possible arrival of one more ICME (corresponding to a CME from 15 December).

Geomagnetismus

Geomagnetic conditions have reached active levels both locally and globally (K_Bel and Kp up to 4). More disturbed geomagnetic conditions can be expected in the next 24 hours with the possible arrival of the 15 December CME.

Protonenflusswerte

The greater than 10 MeV proton flux was below the threshold level 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 measured by GOES 16 and GOES 18 remained below the threshold level in the last 24 hours. It is expected to remain so over the next 24 hours. The 24-hour electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 116, basierend auf 10 Stationen.

Solarindizes für den 17 Dec 2024

Wolf-Zahl Catania	158
10cm Solarflux	170
AK Chambon La Forêt	037
AK Wingst	030
Geschätzer Ap-Wert	027
Geschätzte internationale Sonnenfleckenzahl	091 - Basierend auf 13 Stationen

Zusammenfassung auffälliger Ereignisse

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

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