Het archief bekijken van woensdag 26 juli 2017

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2017 Jul 26 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
26 Jul 2017	070	014
27 Jul 2017	070	014
28 Jul 2017	070	008

Bulletin

Solar activity was at very low levels during the period. Sunspot region NOAA 2668 is decaying and barely visible. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux reached a maximum of about 2 pfu (i.e. below the 10 pfu event threshold) around 21-22UT, and is now gradually declining.

Quiet flaring conditions are expected.

The earth environment remained under the influence of the high speed stream (HSS) from a positive polarity coronal hole (CH). Wind speeds gradually increased from an initial value near 570 km/s to about 660 km/s by 03UT, then decreased to 590 km/s by the end of the period (DSCOVR). Bz oscillated between -5 and +7 nT. The interplanetary magnetic field was mostly directed away from the Sun, with a "towards" sector during the 14-22UT interval.

The geomagnetic field was at quiet to unsettled levels, with an active episode during the 06-09UT interval recorded by both Dourbes and in Kp. Mostly quiet to unsettled geomagnetic conditions are expected, with a chance on another active episode under the persistent influence of the CH HSS.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 000, gebaseerd op 14 stations.

Zon indexen voor 25 Jul 2017

Wolfgetal Catania	000
10cm zonneflux	070
AK Chambon La Forêt	019
AK Wingst	013
Geschatte Ap	013
Geschat internationaal zonnevlekkengetal	000 - Gebaseerd op 32 stations

Overzicht opvallende gebeurtenissen

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

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