Het archief bekijken van vrijdag 28 augustus 2015

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 Aug 28 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Minor storm expected (A>=30 or K=5)

Proton Flux monitor

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

	10cm flux	Ap
28 Aug 2015	115	041
29 Aug 2015	115	021
30 Aug 2015	110	017

Bulletin

Solar flaring activity was low with AR 2403 producing a number of C flares this morning. The largest one peaked at 2:51UT at C8 level. The new region in the South-East was numbered 2405. Larger flaring at M level from region 2403 remains fairly likely. The associated warning condition for proton events is maintained. No Earth-directed CME's were recorded in coronagraph data. While solar wind speed continued to drop from around 350 km/s to around 335 km/s, total magnetic field remained elevated to levels in the 10-15nT range with Bz mainly negative and extended periods of pronounced negative values down to -13nT. Yesterday afternoon saw the anticipated sector boundary crossing into the towards sector. The negative Bz values caused unsettled to moderate geomagnetic storm conditions (local K Dourbes 3-6, NOAA Kp 4-6). Solar wind speed is expected to rise under the influence of a high speed stream from a negative polarity coronal hole. Elevated solar wind conditions are hence expected to continue over the first days before subsiding. Consequently, unsettled to minor geomagnetic storm conditions are expected.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 043, gebaseerd op 18 stations.

Zon indexen voor 27 Aug 2015

Wolfgetal Catania	///
10cm zonneflux	110
AK Chambon La Forêt	056
AK Wingst	041
Geschatte Ap	047
Geschat internationaal zonnevlekkengetal	055 - Gebaseerd op 18 stations

Overzicht opvallende gebeurtenissen

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

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