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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2016 May 26 1230 UTC

SIDC Prognose

Zonnevlammen

C-class flares expected, (probability >=50%)

Geomagnetisme

Active conditions expected (A>=20 or K=4)

Proton Flux monitor

Quiet

	10cm flux	Ap
26 May 2016	093	008
27 May 2016	090	018
28 May 2016	089	010

Bulletin

NOAA 2548 produced the strongest flare of the period, a B9.3 flare peaking at 21:17UT on 25 May. The region is slowly developing, with a few minor filaments near the main spot and some areas of mixed magnetic polarities. NOAA 2546 was quiet and is approaching the western solar limb. No earth-directed coronal mass ejections (CMEs) were observed.

There's a chance on an isolated C-class flare.

Solar wind speed continued its gradual decline from an initial 400 km/s to around 330 km/s by the end of the period. Bz varied between -4 and +4 nT, being mostly positive. The Interplanetary Magnetic Field was directed away from the Sun. Quiet geomagnetic conditions were observed.

Mostly quiet geomagnetic conditions are expected until the arrival of the co-rotating interaction region (CIR) associated with the wind stream from the small negative southern coronal hole (CH). A sector boundary crossing may precede or coincide with the CIR. The arrival of these structures is expected for 26 or 27 May, and may result in active geomagnetic conditions with a slight chance on a minor storming episode. Effects from the wind stream from the negative northern CH are expected for 28 May.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 033, gebaseerd op 28 stations.

Zon indexen voor 25 May 2016

Wolfgetal Catania	048
10cm zonneflux	094
AK Chambon La Forêt	005
AK Wingst	003
Geschatte Ap	003
Geschat internationaal zonnevlekkengetal	031 - Gebaseerd op 19 stations

Overzicht opvallende gebeurtenissen

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

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