Het archief bekijken van woensdag 7 augustus 2019

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2019 Aug 07 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
07 Aug 2019	068	009
08 Aug 2019	067	005
09 Aug 2019	067	004

Bulletin

Solar activity was at very low levels. Small sunspot region NOAA 2747 developed during the period (N06E10; McIntosh class: Axx; MtWilson class: Alpha), but had almost decayed by noon on 7 August. No earth- directed coronal mass ejections (CME) were observed. The greater than 10 MeV proton flux was at nominal values. An irregular shaped negative polarity coronal hole is transiting the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment remained under the influence of the high-speed stream (HSS) of the positive polarity coronal hole. Solar wind speed declined from values near 650 km/s to about 500 km/s by the end of the period (ACE). Bz varied between -4 and + 3 nT. The interplanetary magnetic field (phi angle) was mostly directed away from the Sun (positive sector).

Geomagnetic activity was at quiet to unsettled levels, and is expected to continue under the waning influence of the HSS.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 011, gebaseerd op 14 stations.

Zon indexen voor 06 Aug 2019

Wolfgetal Catania	///
10cm zonneflux	068
AK Chambon La Forêt	018
AK Wingst	013
Geschatte Ap	012
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 27 stations

Overzicht opvallende gebeurtenissen

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

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