Het archief bekijken van dinsdag 18 oktober 2016

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2016 Oct 18 1230 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
18 Oct 2016	078	013
19 Oct 2016	079	012
20 Oct 2016	080	017

Bulletin

Over the past 24 hours solar activity has been low. there were no significant flares and all Active Regions (AR) have shown low levels of activity. Solar protons have remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. There is evidence in EUV imagery (EUV wave and dimming) of a small eruption at 21:10 UT on 2016-Oct-17, from AR 2602 (Mcintosh class:Cao; Mag. type:Beta). As the source is near disk centre it may produce a halo CME in coronagraph imagery. However, Coronagraph imagery for this period is currently unavailable. The size of the wave and the dimming indicate a small eruption, but possibly Earth directed, if significant a PRESTO will be issued. The solar wind speed has been slowly decreasing from around between 750 and 600 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component fluctuated around 0 nT, ranging between -5 and +5 nT. Geomagnetic conditions ranged between Kp index 2-4 (NOAA) and local K index 2-4 (Dourbes) over the past 24 hours. The enhanced solar wind speeds are associated with a High Speed Stream (HSS) from a large negative polarity Southern polar coronal hole located in the western hemisphere. As the hole rotates towards the limb the speed is expected to abate. Geomagnetic conditions are expected to be quiet to unsettled.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 029, gebaseerd op 13 stations.

Zon indexen voor 17 Oct 2016

Wolfgetal Catania	024
10cm zonneflux	076
AK Chambon La Forêt	035
AK Wingst	025
Geschatte Ap	025
Geschat internationaal zonnevlekkengetal	029 - Gebaseerd op 22 stations

Overzicht opvallende gebeurtenissen

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

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