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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2017 Sep 29 1230 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

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

Sonnenprotonen

Quiet

	10cm Fluss	Ap
29 Sep 2017	093	015
30 Sep 2017	093	012
01 Oct 2017	092	007

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. Catania group 55 (NOAA AR region 2681) has been most active, producing one B2.9 flare peaking at 14:34 UT yesterday (29-Sep-2017). No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronograph observations. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with some probability of C-class flares. The Earth is still inside the fast solar wind stream with the speed of about 640 km/s. However the magnitude of the interplanetary magnetic field remained below 5 nT over the past 24 hours, while Bz component varied between -4 and 4.4 nT. Geomagnetic conditions were active yesterday afternoon (Kp = 4 at 12-21 UT; 28 Sep-2017). Later, after a single episode of minor storm (Kp = 5 at 21-24 UT; 28-Sep-2017) geomagnetic conditions became unsettled (29-Sep-2017) with Kp (NOAA) and local K (Dourbes) indexes ranging between 1-3 and 2-3 respectively. The geomagnetic conditions are expected to remain from unsettled to active (Kp = 4) at least until 01-Oct-2017.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 046, basierend auf 20 Stationen.

Solarindizes für den 28 Sep 2017

Wolf-Zahl Catania	059
10cm Solarflux	091
AK Chambon La Forêt	037
AK Wingst	040
Geschätzer Ap-Wert	044
Geschätzte internationale Sonnenfleckenzahl	047 - Basierend auf 31 Stationen

Zusammenfassung auffälliger Ereignisse

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

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