Het archief bekijken van woensdag 21 augustus 2013

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2013 Aug 21 1240 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
21 Aug 2013	135	018
22 Aug 2013	138	008
23 Aug 2013	138	003

Bulletin

Solar activity was eruptive with a C2.2 flare as strongest flare originating from NOAA AR 1828. A faint partial halo CME was observed in LASCO/C2 around 5h00 UT which was confirmed by STEREO A and B data. It seems to be associated to a small filament eruption located near S15E15, observed in PROBA2/SWAP and GONG H-alpha data. The CME seems to be travelling mainly to the east with a projected speed of 360 km/s. First analysis suggests a possible arrival at 25 August at 9h UT, but this will be further evaluated. We expect C-class flaring activity to continue. There is a slight chance for M-class flares, especially from NOAA active regions 1820 and 1827 that currently have a beta-gamma configuration of their photospheric magnetic field. ACE has observed a jump yesterday at 22h UT in all the plasma parameters jump, but not the magnetic field. This seems to be the arrival of the equatorial CH fast speed stream. Local K-index at Dourbes currently is at K=3 and Kp went up to Kp=4, due to combined effects of the fast speed stream and some influence of a flank of the CME of August 17, that possibly arrived at 2h this morning. Unsettled geomagnetic conditions are expected to continue and return to quiet after 24 hours.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 095, gebaseerd op 13 stations.

Zon indexen voor 20 Aug 2013

Wolfgetal Catania	///
10cm zonneflux	132
AK Chambon La Forêt	012
AK Wingst	004
Geschatte Ap	004
Geschat internationaal zonnevlekkengetal	086 - Gebaseerd op 21 stations

Overzicht opvallende gebeurtenissen

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

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