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Tägliches Bulletin zur solaren und geomagnetischen Aktivität des SIDC

Ausgestellt: 2020 Apr 15 1231 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
15 Apr 2020	070	008
16 Apr 2020	070	009
17 Apr 2020	070	009

Bulletin

There were no sunspot groups visible on the solar disk. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal values and are expected to remain so.

STEREO-A and SOHO observed a coronal mass ejection (CME) at both their respective east and west limb starting simultaneously during the afternoon of 14 April. These concerned very slow moving CMEs with a plane-of-the-sky speed around 200 km/s, with no obvious solar disk signature. Standing-by further coronagraphic imagery to determine any earth-directed component.

Solar wind speed undulated between 380 and 450 km/s ending the period near 415 km/s (DSCOVR). Bz varied between -4 and +3 nT, however with a mostly negative stretch between 20 and 05UT. The direction of the interplanetary magnetic field (phi angle) was mostly variable, but ended the period in a predominantly sunward orientation (negative sector).

Geomagnetic activity was at quiet to unsettled levels and is expected to remain so during the next few days.

Die heute international geschätzte Sonnenfleckenanzahl (ISN): 000, basierend auf 30 Stationen.

Solarindizes für den 14 Apr 2020

Wolf-Zahl Catania	///
10cm Solarflux	069
AK Chambon La Forêt	014
AK Wingst	008
Geschätzer Ap-Wert	009
Geschätzte internationale Sonnenfleckenzahl	000 - Basierend auf 33 Stationen

Zusammenfassung auffälliger Ereignisse

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

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