Het archief bekijken van vrijdag 7 april 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Apr 07 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
07 Apr 2017	072	008
08 Apr 2017	070	005
09 Apr 2017	072	009

Bulletin

Solar activity was at low levels during the period. Two C-class flares were recorded: a C5.5 flare at the very beginning of the period (12:10UT), and a C2.7 event peaking at 00:25UT. Both flares originated from NOAA 2645's trailing portion, which is now very close to the west limb. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

C-class flaring remains possible, with a small chance on an isolated M-class flare.

Solar wind speed gradually decreased from an initial 490 km/s to 420 km/s by the end of the period. Bz fluctuated between -5 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun. The particle stream from a narrow extension from the positive polar coronal hole may affect the earth environment on 9 or 10 April.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so, with only a small chance on an isolated active episode.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 027, gebaseerd op 16 stations.

Zon indexen voor 06 Apr 2017

Wolfgetal Catania	044
10cm zonneflux	076
AK Chambon La Forêt	014
AK Wingst	009
Geschatte Ap	008
Geschat internationaal zonnevlekkengetal	037 - Gebaseerd op 27 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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