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Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 May 13 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Major magstorm expected (A>=50 or K>=6)

Proton Flux monitor

Quiet

	10cm flux	Ap
13 May 2015	160	038
14 May 2015	158	038
15 May 2015	156	018

Bulletin

NOAA 2339 is decaying and produced only low-level C-class flares. NOAA 2342 produced the strongest flare of the period, a C3.5 flare peaking at 05:59UT and located in its trailing portion. The flare was associated with a series Type III radio-burst, and a surge was observed in H-alpha. The greater than 10 MeV proton flux is nearly back at nominal levels. No earth-directed coronal mass ejections (CME) were observed over the period.

Further C-class flaring is expected, with a chance on an M-class flare.

Moderate geomagnetic storming has been observed as the Earth is under the influence of the high speed stream (HSS) of a recurrent coronal hole. Kp reached 6 between 03:00 and 09:00UT, while Dourbes reported a maximum K of 4. Solar wind speed is currently at about 700 km/s, while Bz-values were at -14 nT between 04:00 and 04:30UT.

Further episodes of minor to moderate geomagnetic storming are expected.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 121, gebaseerd op 20 stations.

Zon indexen voor 12 May 2015

Wolfgetal Catania	216
10cm zonneflux	163
AK Chambon La Forêt	031
AK Wingst	016
Geschatte Ap	019
Geschat internationaal zonnevlekkengetal	115 - Gebaseerd op 28 stations

Overzicht opvallende gebeurtenissen

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

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