Viewing archive of Sunday, 27 December 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2020 Dec 27 1255 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
27 Dec 2020	088	006
28 Dec 2020	090	003
29 Dec 2020	091	012

Bulletin

Solar flaring activity was at very low levels. No significant flares have been recorded. Solar activity is expected to remain mainly at low levels, with a low chance of C class flares.

A narrow Coronal Mass Ejection was detected in Lasco images on Dec 27 00:48UT at the SW quadrant. It seems to be associated with a filament eruption on that region. More will be reported as more data become available.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux remained on high levels the past 24 hours, without crossing the threshold of 1000 pfu. It is expected to remain at those levels in the next 24 hours. The greater than 2 MeV electron fluence remained enhanced in the past 24 hours, while slightly decreased compared to yesterday. It is expected to continue slowly decreasing in the next 24 hours.

Solar wind speed near Earth as registered by DSCOVR and ACE varied between 405 and 490 km/s in the past 24 hours. The orientation of the Interplanetary Magnetic Field switched from the positive (away from the Sun) to the negative sector about Dec 26 23:15UT. Its magnitude varied between about 2 and 7 nT while Bz varied between -5 and 4 nT. Solar wind conditions are anticipated to remain at about those levels for the next 24 hours.

Quiet geomagnetic conditions were registered in the past 24 hours, with values for K Dourbes varying between 0-2 and for NOAA Kp 1-2. Quiet geomagnetic conditions are to be expected in the next 24 hours.

Today's estimated international sunspot number (ISN): 026, based on 09 stations.

Solar indices for 26 Dec 2020

Wolf number Catania	///
10cm solar flux	088
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	028 - Based on 18 stations

Noticeable events summary

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

All times in UTC

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