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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2020 Oct 09 1239 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
09 Oct 2020	073	005
10 Oct 2020	073	007
11 Oct 2020	073	007

Bulletin

Solar X-ray flux remained below B level throughout the period. There are now two spotted regions in the Southern hemisphere. Both are simple bipolar regions. Overall chances for flaring at C level are very low.

A filament erupted from the South-Western quadrant starting around 21:18 UT as visible in SDO/AIA 304 images. Coronagraph images however, so not show any sign of a possible associated Coronal Mass Ejection.

No Earth directed Coronal Mass Ejections (CME's) have been observed in coronagraph data.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux is at enhanced levels reaching to just below the 10^3 pfu event threshold at its diurnal maximum. The electron flux is expected to show a slow decrease over the next days.

Solar wind conditions were nominal. Solar wind decreased from above 350 km/s towards 315 km/s by the end of the period. Total magnetic field was below 4nT with a variable Bz component. The phi angle was mostly in the negative (towards the Sun) sector but was somewhat variable. Solar wind conditions are expected to be nominal over the next days.

Geomagnetic conditions were quiet (NOAA Kp 0-1 and local K Dourbes 0-2). Geomagnetic conditions are expected to be quiet in the next 48 hours.

Today's estimated international sunspot number (ISN): 021, based on 21 stations.

Solar indices for 08 Oct 2020

Wolf number Catania	000
10cm solar flux	072
AK Chambon La Forêt	005
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	005 - Based on 16 stations

Noticeable events summary

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

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