Het archief bekijken van zondag 30 juli 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Jul 30 1230 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

Active conditions expected (A>=20 or K=4)

Proton Flux monitor

Quiet

	10cm flux	Ap
30 Jul 2017	075	008
31 Jul 2017	079	015
01 Aug 2017	080	006

Bulletin

Solar activity was at very low levels. Sunspot group NOAA 2669 (Catania 40) is visible at location N17W30. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with an increasing chance on a C-class flare from returning active region NOAA 2665.

Solar wind speed decreased further from about 430 to 370 km/s. Bz oscillated between -3 and +4 nT (DSCOVR). The interplanetary magnetic field was mostly directed away from the Sun. A small negative equatorial coronal hole (CH) transited the central meridian from 27 till 29 July.

The geomagnetic field was at quiet levels with a single unsettled episode recorded at Dourbes during the 15-18UT interval. Quiet to unsettled geomagnetic conditions are expected until the arrival of the particle stream associated with the aforementioned CH, which may start influencing the earth environment late on 30 or on 31 July, possibly resulting in an active episode.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 013, gebaseerd op 17 stations.

Zon indexen voor 29 Jul 2017

Wolfgetal Catania	///
10cm zonneflux	070
AK Chambon La Forêt	007
AK Wingst	006
Geschatte Ap	004
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 25 stations

Overzicht opvallende gebeurtenissen

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

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