Перегляд архіву четвер, 7 січня 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2021 Jan 07 1240 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
07 Jan 2021	074	005
08 Jan 2021	074	007
09 Jan 2021	074	007

Bulletin

Solar X-ray flux remained below background (B) level. With no active regions on disc, solar flaring activity is expected to be very low.

The CME towards the North-West reported yesterday was further analysed as more LASCO C2 images came in. It is believed to be too far North-West to have impact on Earth. There are no other new Earth directed CMEs observed in coronagraph data.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu event threshold and is expected to remain below that threshold over the next 24 hours. The 24h electron fluence was at nominal levels. It may rise to moderate levels, related to the recent elevated Solar wind conditions although these are already subsiding and hence any such rise in electron fluence is expected to be fairly limited.

Solar wind showed a transition from high speed stream conditions towards background Solar wind conditions. Solar wind speed decreased from over 600 km/s to around 450 km/s by the end of the period. The interplanetary magnetic field was around 5nT with a general decreasing trend. The magnetic field phi angle switched into the positive sector (away from the Sun) again around 4UT. The return to background Solar wind conditions is expected to continue over the next 48 hours. There are no CME arrivals expected anymore at this point.

Geomagnetic conditions were quiet (both NOAA Kp and local K Dourbes 1-2). Quiet geomagnetic conditions are expected over the next days.

Today's estimated international sunspot number (ISN): 000, based on 10 stations.

Solar indices for 06 Jan 2021

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	///
AK Wingst	///
Estimated Ap	010
Estimated international sunspot number	000 - Based on 15 stations

Noticeable events summary

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

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