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Daily bulletin on solar and geomagnetic activity from the SIDC

Emitido: 2021 Jan 01 1230 UTC

SIDC Forecast

Llamarada solar

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

Geomagnetism

Quiet (A<20 and K<4)

Protones solares

Quiet

	10cm flux	Ap
01 Jan 2021	080	001
02 Jan 2021	079	003
03 Jan 2021	078	007

Bulletin

Solar activity was at very low levels over the past 24 hours. No significant flares have been recorded. NOAA Active Region 2795 (beta) continued to decay while NOAA AR2794 (alpha) remained stable. Solar activity is expected to remain at low levels, with a low probability of C-class flares.

No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraphic imagery.

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 was slightly enhanced but remained below the 1000 pfu alert threshold. The electron flux is expected to remain slightly enhanced over the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so over the next 24 hours.

Over the past 24 hours, the solar wind speed decreased from 410 to 340 km/s (DSCOVR and ACE). The total magnetic field strength ranged between 0 and 4 nT. Bz had a minimum value of -3 nT. The interplanetary magnetic field was predominantly directed towards the Sun (phi angle in the negative sector). Over the next 24 hours, the solar wind parameters are expected to be at nominal levels. A slight enhancement is expected on Jan 03 from the high- speed stream associated with the small positive polarity coronal hole which began to cross the central meridian on Dec 30.

Geomagnetic conditions were at quiet levels over the past 24 hours (NOAA Kp and local k Dourbes recorded values of 0-1). Geomagnetic conditions are expected to be at quiet levels until Jan 03, when unsettled conditions may occur due to coronal hole influences.

Today's estimated international sunspot number (ISN): 024, based on 14 stations.

Solar indices for 31 Dec 2020

Wolf number Catania	///
10cm solar flux	081
AK Chambon La Forêt	006
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	032 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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