Archiv von Montag, 20 Oktober 2025 anzeigen

Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2025 Oct 20 1231 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
20 Oct 2025	146	012
21 Oct 2025	144	013
22 Oct 2025	144	007

Solaraktive Regionen und Flares

Solar flaring activity was moderate over the past 24 hours, with two M-class flares recorded. The largest flare was an M1.8 flare (SIDC Flare 5840), peaking on October 19 at 20:15 UTC, originating from behind the west limb and likely associated with SIDC Sunspot Group 639 (NOAA Active Region 4246). SIDC Sunspot Group 621 (NOAA Active Region 4248), which is now rotating over the west limb, produced an M1.0 flare (SIDC Flare 5845), peaking on October 20 at 05:27 UTC. Isolated low-level flaring was also produced by active regions behind the east limb. The remaining active regions on the disk are relatively simple (magnetic type alpha or beta) and did not produce any significant flaring activity. Solar flaring activity is expected to be at low to moderate levels over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Koronaler Massenauswurf

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

Sonnenwind

Over the past 24 hours, the solar wind parameters were slightly disturbed under the influence of a high-speed stream (HSS). The interplanetary magnetic field reached values up to 10 nT before decreasing to around 4 nT. The solar wind speed ranged between 500 and 650 km/s. The southward component of the interplanetary magnetic field fluctuated between -10 nT and 8 nT. The magnetic field orientation was predominantly in the negative sector (field directed towards the Sun). Solar wind conditions are expected to remain slightly elevated over the next days due to the influence of a high-speed stream from a recurrent negative polarity coronal hole (SIDC Coronal Hole 126).

Geomagnetismus

Geomagnetic conditions were quiet to unsettled both globally and locally over Belgium (NOAA Kp: 1 to 3; K-Bel: 1 to 3). Mostly unsettled geomagnetic conditions are expected over the next 24 hours, with a chance of isolated active periods due to the ongoing high-speed stream influence.

Protonenflusswerte

The greater than 10 MeV GOES proton flux was below the 10 pfu 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 measured by GOES 18 and GOES 19 was below the 1000 pfu threshold. The greater than 2 MeV electron flux is expected to remain below the 1000 pfu threshold over the next 24 hours. The 24-hour electron fluence was at normal levels and is expected to be at normal levels over the next 24 hours.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 109, basierend auf 12 Stationen.

Solarindizes für den 19 Oct 2025

Wolf-Zahl Catania	///
10cm Solarflux	149
AK Chambon La Forêt	022
AK Wingst	020
Geschätzer Ap-Wert	020
Geschätzte internationale Sonnenfleckenzahl	110 - Basierend auf 09 Stationen

Zusammenfassung auffälliger Ereignisse

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

Alle Zeiten in UTC

<< Zum Tagesübersicht