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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2019 Apr 11 1233 UTC

Vorhersage des SIDC

Sonneneruptionen

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

Geomagnetismus

Quiet (A<20 and K<4)

Sonnenprotonen

Quiet

	10cm Fluss	Ap
11 Apr 2019	078	011
12 Apr 2019	078	007
13 Apr 2019	078	008

Bulletin

Over the past 24 hours solar activity has been low. The largest flare was a B2.1 class flare (Although, a similar magnitude flare was occurring at time of writing). Active Region (AR) 2738 (Mcintosh class:Cho; Mag. type:Beta) has produced all the flaring activity, the region has shown some evidence of flux emergence and cancellation in HMI magnetogram observations, this may increase flaring activity. No significant filament channels have been seen on the solar disk. However, there is evidence of a back-sided filament eruption (STEREO-A Observations) near the south polar coronal hole occurring around 14:30 UT. The eruption can be seen as a small Coronal Mass Ejection (CME) emerging to the south-east of the solar disk, in LASCO observations. The eruption is not expected to interact with the Earth system. No Earth directed CMEs have been detected. There are no significant low latitude coronal holes on the solar disk. 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 a reasonable chance of a C-class flare from AR 2738.

The solar wind speed has fluctuated between 410 and 460 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 5 nT. The Bz component has fluctuated around 0 nT, ranging between -5 and +4 nT. Geomagnetic conditions ranged between Kp index 2-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 013, basierend auf 23 Stationen.

Solarindizes für den 10 Apr 2019

Wolf-Zahl Catania	///
10cm Solarflux	078
AK Chambon La Forêt	021
AK Wingst	015
Geschätzer Ap-Wert	017
Geschätzte internationale Sonnenfleckenzahl	015 - Basierend auf 30 Stationen

Zusammenfassung auffälliger Ereignisse

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

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