Visualizzazione archivio di martedì, 4 febbraio AM

Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 Feb 04 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
04 Feb 2020	071	005
05 Feb 2020	071	012
06 Feb 2020	071	018

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.

The proton flux levels were at background values and expected to remain so.

Solar wind conditions were nominal. Solar wind speed further decreased from around 380 km/s to around 350 km/s. Total magnetic field was around 5 nT with a variable Bz. The magnetic field phi angle was mostly in the negative sector but tended towards the positive sector lately. Nominal solar wind conditions are expected over the next 24 hours with from noon February 5 onwards enhancements due to the fast flow from the extension of the South polar coronal hole.

Geomagnetic conditions were quiet to unsettled (local K Dourbes 0-2, NOAA Kp 0-3). Mainly quiet to unsettled conditions are expected over the next 24 hours with from noon February 5 onwards, unsettled conditions likely and active periods possible.

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

Solar indices for 03 Feb 2020

Wolf number Catania	///
10cm solar flux	072
AK Chambon La Forêt	006
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	000 - Based on 24 stations

Noticeable events summary

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

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