Просмотр архива за пятница, 7 февраля 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2020 Feb 07 1244 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
07 Feb 2020	071	012
08 Feb 2020	071	010
09 Feb 2020	071	007

Bulletin

X-ray flux remained below B level throughout the period. The Sun is spotless and no flaring is expected.

No Earth-directed CMEs have been observed in coronagraph data.

A low latitude positive polarity coronal hole on the Northern hemisphere is transiting the central meridian since this morning. It is expected to influence Solar wind conditions near Earth starting late February 10.

The proton flux levels were at background values and expected to remain so. High energy electron fluxes are expected to rise due to the ongoing high speed Solar wind conditions.

Solar wind conditions showed the passage of the high speed stream proper from the Southern polar coronal hole extension. Solar wind speed reached well over 600 km/s (to around 650 km/s around 2UT). Total magnetic field declined from around 10nT to under 5nT over the period. Bz was variable with some peaks don to -8nT. The magnetic field phi angle was in the negative sector throughout the period. Solar wind conditions are expected to remain enhanced initially, while decaying slowly over the next days.

Geomagnetic conditions reached minor storm levels locally (local K Dourbes 5 late yesterday) while NOAA Kp reached active levels (4) at most. Geomagnetic conditions are expected to be quiet to unsettled over the next days with initially some active periods still possible.

Today's estimated international sunspot number (ISN): 000, based on 17 stations.

Solar indices for 06 Feb 2020

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	031
AK Wingst	020
Estimated Ap	021
Estimated international sunspot number	000 - Based on 25 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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