Het archief bekijken van woensdag 27 augustus 2014

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2014 Aug 27 1235 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
27 Aug 2014	125	013
28 Aug 2014	123	010
29 Aug 2014	120	008

Bulletin

Solar activity has decreased in the past 24 hours. Only a few C-class flares were observed, with NOAA ARs 2146, 2149 and 2151 as source regions. The largest flare was a C5.6 flare, peaking at 23:25 UT on August 26. No Earth-directed CMEs were observed. Flaring activity is expected to continue at the level of C-flares, with a slight chance for an isolated M-class flare. The risk for a proton event has reduced, but for the time being we leave the warning condition due to position of AR 2146 which still has a delta component. Solar wind observations indicate the arrival of an ICME around 0:00 UT of August 27, related to the CMEs of August 22. The magnitude of the magnetic field has smoothly increased from about 5 to 15 nT. The Bz component is southward with values up to -14 nT. Solar wind speed increased from 280 to 320 km/s, while there were only small variations in density and temperature. Geomagnetic conditions are currently unsettled (local K at Dourbes=3) to active (NOAA Kp=4), which is expect to persist for the next few hours, till quiet conditions return. The potential arrival of the August 25 CMEs might cause active conditions again from the UT afternoon of August 28 onwards.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 070, gebaseerd op 15 stations.

Zon indexen voor 26 Aug 2014

Wolfgetal Catania	///
10cm zonneflux	128
AK Chambon La Forêt	008
AK Wingst	004
Geschatte Ap	003
Geschat internationaal zonnevlekkengetal	066 - Gebaseerd op 10 stations

Overzicht opvallende gebeurtenissen

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

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