Viewing archive of Sunday, 21 January 2024

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2024 Jan 21 1253 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
21 Jan 2024	166	007
22 Jan 2024	166	015
23 Jan 2024	166	020

Solar Active Regions and flaring

Solar flaring activity over the past 24 hours was at low levels with several C-class flares. The bipolar NOAA Active Region 3559 was the most productive. It produced the larger flare, a C6.3-class flare with a peak time of 02:02 UTC on January 21.The solar flaring activity is likely to be at low levels over the coming days with C-class flares and possible M-class flares.

Coronal mass ejections

A partial halo coronal mass ejection (CME) was observed directed to the south-east in SOHO/LASCO C2 chronograph images on January 20, at 09:24 UTC. The projected angular width is 151 degrees, and the projected speed is 631 km/s as estimated by SIDC/CACTUS tool. The source of this CME is a filament eruption. Due to the location to the filament, near the central meridian, the CME is heading towards Earth and is expected to impact the solar wind condition near Earth in 1-2 days from now, with a possible also some geomagnetic impact. Another partial halo CME was observed directed to the East in SOHO/LASCO C2 chronograph images on January 21, at 00:24 UTC. The projected angular width is 186 degrees, and the projected speed is 480 km/s as estimated by SIDC/CACTUS tool. Analysis of the event is ongoing.

Solar wind

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by DSCOVR ranged between 350 km/s and 470 km/s. The total interplanetary magnetic field was below 6 nT, and the Bz (north-south) component fluctuating between -6 nT and 4 nT. Slow solar wind conditions are expected for the next 24 hours. The CME from January 20, at 09:24 UTC is expected to impact the solar wind condition near Earth on the 22-23 of January.

Geomagnetism

The geomagnetic conditions over the past 24 hours were quiet (NOAA-Kp and K-Bel 1-2). Mostly quiet conditions are expected in the next 24 hours.

Proton flux levels

The greater than 10 MeV protons flux where at background levels. It is expected to be at background levels in the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the next 24 hours. The 24h electron fluence was at nominal level and is expected to remain so in the next 24 hours.

Today's estimated international sunspot number (ISN): 164, based on 05 stations.

Solar indices for 20 Jan 2024

Wolf number Catania	///
10cm solar flux	166
AK Chambon La Forêt	007
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	126 - Based on 16 stations

Noticeable events summary

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

All times in UTC

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