Het archief bekijken van vrijdag 4 augustus 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Aug 04 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Minor storm expected (A>=30 or K=5)

Proton Flux monitor

Quiet

	10cm flux	Ap
04 Aug 2017	076	029
05 Aug 2017	076	021
06 Aug 2017	076	007

Bulletin

Beta region NOAA 2670 produced a few low B flares within the past 24 hours. The probability for a C flare within the next 24 hours is estimated at 45%, with a slight chance for an M flare (10%). No earth- directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels. DSCOVR registered a jump in both solar wind density and magnitude of the Interplanetary Magnetic Field (IMF) at 9:38 UT on August 3, followed by a gradual rise of both solar wind density (maximum: about 59 particles per cc at 4:15 UT on August 4) and magnitude of the IMF (maximum: about 21 nT at 6:20 UT on August 4), announcing the anticipated arrival of a high speed solar wind stream of a large positive coronal hole extending from the north pole to the equatorial region. Around 1h UT on August 4, the IMF changed direction and started pointing away from the Sun. Near the same time, solar wind speed started rising gradually to a maximum of about 715 km/s at 11:20 UT. Current solar wind values are about 650 km/s and the current magnitude of the IMF is about 14 nT. Bt was very variable, in the range from about -17 to 20 nT. Quiet to active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2 and 4) were registered in the past 24 hours. Under the influence of the aforementioned high speed stream, active to minor storm conditions (K Dourbes = 4 to 5) are possible on August 4 and 5, with a slight chance for moderate geomagnetic storm intervals (K Dourbes = 6). Quiet to unsettled geomagnetic levels are expected on August 6.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 012, gebaseerd op 17 stations.

Zon indexen voor 03 Aug 2017

Wolfgetal Catania	013
10cm zonneflux	075
AK Chambon La Forêt	029
AK Wingst	016
Geschatte Ap	016
Geschat internationaal zonnevlekkengetal	013 - Gebaseerd op 39 stations

Overzicht opvallende gebeurtenissen

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

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