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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2021 May 19 1231 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
19 May 2021	077	016
20 May 2021	079	007
21 May 2021	079	007

Bulletin

Two active regions (ARs) visible on the disk, NOAA AR 2822 (alpha magnetic field configuration) and AR 2824 (beta magnetic field configuration). Only B-class flares in past 24 hours. C-class flares are possible.

No Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraphic imagery in the last 24 hours.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu in the past 24 hours and is expected to remain so. The 24-hour electron fluence was at normal levels in the past 24 hours and is expected to remain so.

In the last 24 hours, the solar wind speed varied between 350 and 400 km/s. The interplanetary magnetic field reached 9 nT with Bz mostly positive. The interplanetary magnetic field polarity was negative (towards the Sun). The high speed solar wind from the coronal hole that crossed the central meridian on 15 May is expected to arrive to the Earth today.

Geomagnetic conditions have been mostly quiet (KDourbes 0-3, Kp 1-2). Active conditions can be expected when the high speed solar wind stream arrives to the Earth today.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 026, basierend auf 23 Stationen.

Solarindizes für den 18 May 2021

Wolf-Zahl Catania	///
10cm Solarflux	076
AK Chambon La Forêt	010
AK Wingst	012
Geschätzer Ap-Wert	012
Geschätzte internationale Sonnenfleckenzahl	028 - Basierend auf 32 Stationen

Zusammenfassung auffälliger Ereignisse

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

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