Het archief bekijken van zondag 28 september 2014

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2014 Sep 28 1235 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Quiet (A<20 and K<4)

Proton Flux monitor

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10cm flux	Ap
28 Sep 2014	188	010
29 Sep 2014	193	012
30 Sep 2014	196	007

Bulletin

Solar activity was moderate with an M5.1 flare from NOAA AR 2173 peaking at 2:58 UT. It was associated with type II radio bursts and a dimming. Coronagraph data however seen to indicate just a narrow south- eastward directed CME. AR 2172 and 2173 produced a further number of C flares. AR 2172, 2173, and 2175 remain active and are the most likely sources on disc. New flaring activity at M level is likely. With the main active regions on disc approaching moving to the west the chances for a proton event are increasing. After touching minima of below 380 km/s in the first half of the reporting period, solar wind speed picked up slightly again to around 420 km/s presently. Total magnetic field was mainly in the 5-7 nT range with Bz variable mainly in the +-4nT range with a period of negative Bz peaking below -5nT around 10:00 UT. Geomagnetic conditions were accordingly quiet with unsettled conditions late this morning. Quiet to unsettled conditions are expected to continue with some active periods still possible in the first 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 129, gebaseerd op 11 stations.

Zon indexen voor 27 Sep 2014

Wolfgetal Catania	///
10cm zonneflux	181
AK Chambon La Forêt	013
AK Wingst	016
Geschatte Ap	017
Geschat internationaal zonnevlekkengetal	129 - Gebaseerd op 18 stations

Overzicht opvallende gebeurtenissen

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

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