Het archief bekijken van donderdag 20 december 2018

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2018 Dec 20 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
20 Dec 2018	070	013
21 Dec 2018	070	004
22 Dec 2018	071	004

Bulletin

The Sun is spotless and did not produce any B class flares or higher in the past 24 hours. The chance for a C flare in the next 24 hours is estimated low. However, former region 2731 (N15W20) produced a couple of small dimmings at 12:00 UT yesterday. But, no associated Earth-directed CMEs were detected in available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed near Earth as registered by DSCOVR gradually increased from about 475 to 650 km/s in the past 24 hours, under the influence of a solar wind stream associated with an isolated negative polarity coronal hole. The Interplanetary Magnetic Field (IMF) was predominantly directed towards the Sun and varied between about 5 and 10 nT. Bz varied between 4 and -6 nT. The solar wind speed is expected to begin declining today.

Quiet to unsettled geomagnetic conditions (K Dourbes between 1 and 3; NOAA Kp between 1 and 3) were registered in the past 24 hours. There is a chance for active intervals (K Dourbes = 4) due to the enhanced solar wind speeds. Quiet to unsettled geomagnetic levels are expected over the next 24 hours.

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

Zon indexen voor 19 Dec 2018

Wolfgetal Catania	///
10cm zonneflux	070
AK Chambon La Forêt	013
AK Wingst	006
Geschatte Ap	005
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 19 stations

Overzicht opvallende gebeurtenissen

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

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