Het archief bekijken van zaterdag 15 april 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Apr 15 1257 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
15 Apr 2017	073	009
16 Apr 2017	076	011
17 Apr 2017	078	014

Bulletin

Solar activity was at very low levels. The strongest event was a B1.2 flare peaking at 16:21 UT yesterday. No Earth-directed CMEs were observed in available coronagraph imagery. Integral proton flux for protons with energies above 10 MeV remained at background level. B-class flaring is expected today. C-class flaring is possible from tomorrow (April 16) due to anticipated return of old active region NOAA 2644 to the visible solar disk.

Solar wind speed declined from about 380 km/s to values around 340 km/s by the end of the reporting period. The interplanetary magnetic field gradually decreased from 7.7 nT to 3.8 nT. Bz fluctuated between -5 nT and +3 nT, being positive after 06UT. Geomagnetic conditions were ranged K Dourbes between 1 and 4; NOAA Kp between 1 and 3. Geomagnetic conditions are expected to be quiet to unsettled today (April 15) and tomorrow (April 16). Active to minor storm geomagnetic conditions can be expected on April 17 due to the onset of a large positive polarity CH HSS.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 09 stations.

Zon indexen voor 14 Apr 2017

Wolfgetal Catania	028
10cm zonneflux	073
AK Chambon La Forêt	022
AK Wingst	016
Geschatte Ap	016
Geschat internationaal zonnevlekkengetal	018 - Gebaseerd op 23 stations

Overzicht opvallende gebeurtenissen

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

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