Het archief bekijken van zondag 29 januari 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Jan 29 1230 UTC

SIDC Prognose

Zonnevlammen

Quiet conditions (<50% probability of C-class flares)

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
29 Jan 2017	079	003
30 Jan 2017	077	005
31 Jan 2017	076	019

Bulletin

Solar activity was low, with an isolated C2.8 flare produced by spotless region NOAA 2627 near the west limb on 28 January at 21:09UT. A new active region rotated over the east limb with only a few tiny spots. NOAA 2628 and NOAA 2629 were quiet. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with a small chance on a C-class event.

Solar wind speed declined from 540 km/s to values around 460 km/s under the waning influence of the coronal hole's high speed stream (HSS). Bz fluctuated between -4 and +4 nT. The interplanetary magnetic field was mostly directed away from the Sun. A negative CH is transiting the central meridian (CM) and may start influencing the earth environment around 31 January, probably preceded by a sector boundary crossing (SBC).

The geomagnetic field was at quiet (Dourbes) to unsettled (Kp) levels. Mostly quiet to unsettled conditions are expected till the arrival of the SBC and the CIR/HSS structure from the negative CH, when active episodes may become possible.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 033, gebaseerd op 09 stations.

Zon indexen voor 28 Jan 2017

Wolfgetal Catania	///
10cm zonneflux	079
AK Chambon La Forêt	016
AK Wingst	010
Geschatte Ap	010
Geschat internationaal zonnevlekkengetal	029 - Gebaseerd op 27 stations

Overzicht opvallende gebeurtenissen

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

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