Het archief bekijken van zaterdag 19 september 2015

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2015 Sep 19 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
19 Sep 2015	104	026
20 Sep 2015	104	026
21 Sep 2015	102	018

Bulletin

NOAA 2415 has lost its delta, but remains magnetically complex. No (zero) C-class flares were observed during the period. The coronal mass ejection (CME) associated to the long duration event on 18 September (C2.6 flare peaking at 06:31UT) was directed to the south of the ecliptic. A glancing blow can not be excluded and could arrive late on 20 or on 21 September.

C-class flares are expected, with a small chance on an M-class flare from NOAA 2415.

Solar wind speed varied mostly between 410 and 450 km/s. Around 03:00UT, a gradual change in solar wind temperature and Bz was observed, accompanied by a mild increase in density and, around 05:00UT, a change in the direction of the interplanetary magnetic field from away to towards the Sun. Bz varied between -8 and +7 nT, being predominantly negative between 05:00 and 09:00UT. Quiet to active geomagnetic conditions were observed in Dourbes, while the Kp-index reached minor storming during the 06-09UT interval. Further data are awaited to pinpoint the source of the observed disturbance.

Quiet to active geomagnetic conditions are expected. Minor geomagnetic storming is still possible on 19 or on 20 September in response to the anticipated arrival of the solar wind stream of the positive transequatorial coronal hole. Late on 20 or on 21 September, the glancing blow of the 18 September CME may arrive at Earth, but currently only active geomagnetic conditions are expected.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 061, gebaseerd op 13 stations.

Zon indexen voor 18 Sep 2015

Wolfgetal Catania	///
10cm zonneflux	103
AK Chambon La Forêt	026
AK Wingst	012
Geschatte Ap	014
Geschat internationaal zonnevlekkengetal	067 - Gebaseerd op 25 stations

Overzicht opvallende gebeurtenissen

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

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