Het archief bekijken van vrijdag 25 april 2014

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2014 Apr 25 1246 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Quiet

	10cm flux	Ap
25 Apr 2014	127	006
26 Apr 2014	125	007
27 Apr 2014	125	012

Bulletin

NOAA 2035, already behind the west limb, produced an X1.3 flare peaking at 00:27 UT. No obvious proton flux increase has been observed so far. The event was accompanied by an EIT-wave towards the south (PROBA2/SWAP) and a CME (SOHO/LASCO and STEREO). The CME has a speed of about 500 km/s (CACTUS) and is directed away from Earth. There are currently 5 sunspot regions on disk. They are all quite small and have a quite simple magnetic configuration. An active region, responsible for backside CMEs on 22 and 25 April, is approaching the southeast limb. There's still a chance on a C-class flare, in particular from the regions near the solar limb. There's a decreasing chance on a strong flare from NOAA 2035 as it rotates further onto the Sun's farside. Solar wind speed varied between 400 and 500km/s, and Bz between -5 and +4nT being mostly negative between 21:00 and 01:00UT. Hence, quiet geomagetic conditions were observed, with locally a brief active period. A small equatorial coronal hole passed the central meridian last night. The geomagnetic field may be impacted starting around 27 April. Geomagnetic conditions are expected to be quiet, with locally a brief active interval possible.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 046, gebaseerd op 13 stations.

Zon indexen voor 24 Apr 2014

Wolfgetal Catania	///
10cm zonneflux	130
AK Chambon La Forêt	020
AK Wingst	017
Geschatte Ap	015
Geschat internationaal zonnevlekkengetal	053 - Gebaseerd op 22 stations

Overzicht opvallende gebeurtenissen

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

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