Het archief bekijken van dinsdag 25 augustus 2020

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2020 Aug 25 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
25 Aug 2020	072	011
26 Aug 2020	072	017
27 Aug 2020	072	011

Bulletin

Solar X-ray flux has been below background (B) level throughout the period. There are no spotted regions on disc and X-ray flux is expected to remain at or below background (B) values.

There were no Earth directed coronal mass ejections observed in coronagraph data.

The greater than 10 MeV proton flux was at background levels over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electron flux was at nominal levels over the past 24 hours and is expected to remain so over the next 24 hours.

Another low latitude coronal hole with positive polarity is currently rotating over the central meridian in the Northern hemisphere (It is currently not connected to the polar coronal hole). It's impact on near Earth Solar wind may be expected on August 28.

Solar wind conditions were close to nominal. Solar wind speed decreased from close to 400 km/s at the start of the period to under 350 km/s presently. The magnetic field strength hovered around 5nT and remained at that level. The magnetic field phi angle was mainly in the towards sector. There are hence no signs yet of the expected Solar wind enhancement, due to the possible influence of a high speed stream from the extension of the Northern (positive polarity) polar coronal hole. But, it may still set through in the next 48 hours. Afterwards, from August 28 onwards, we may see again some enhancement related to the coronal hole currently transiting the central meridian.

Geomagnetic conditions were quiet (both NOAA Kp and local K Dourbes 0-2). Geomagnetic conditions are expected to be mostly quiet to unsettled, with some isolated active periods not excluded depending on the strength of the expected Solar wind enhancements.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 12 stations.

Zon indexen voor 24 Aug 2020

Wolfgetal Catania	///
10cm zonneflux	070
AK Chambon La Forêt	005
AK Wingst	003
Geschatte Ap	003
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 31 stations

Overzicht opvallende gebeurtenissen

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

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