Het archief bekijken van zaterdag 20 mei 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 May 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 May 2017	072	021
21 May 2017	072	024
22 May 2017	072	021

Bulletin

In the past 24 hours, no C flares were observed. Very low solar activity (no C flares) is expected in the next 24 hours. Solar wind speed measured by DSCOVR varied between about 430 and 490 km/s until around 18:30 UT on May 19, when it started rising to a plateau around 600 km/s. At 8:52 UT on May 20, the solar wind speed jumped to about 710 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) varied between about 5 and 15 nT until 8:52 UT on May 20, when it fell from 13 to 6 nT. These are clear signs of the arrival of the predicted high speed stream from a negative equatorial coronal hole. Bz was regularly between -5 and -10 nT between 5h and 9h UT. Unsettled geomagnetic conditions (K Dourbes equal to 3; NOAA Kp between 2 and 4) were registered in the past 24 hours. Active (K Dourbes = 4) to minor storm conditions (K Dourbes = 5) are possible on May 20, 21 and 22, due to the arrival the predicted high speed stream.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 032, gebaseerd op 20 stations.

Zon indexen voor 19 May 2017

Wolfgetal Catania	028
10cm zonneflux	072
AK Chambon La Forêt	024
AK Wingst	016
Geschatte Ap	016
Geschat internationaal zonnevlekkengetal	023 - Gebaseerd op 23 stations

Overzicht opvallende gebeurtenissen

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

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