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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 Jan 26 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
26 Jan 2024	160	007
27 Jan 2024	150	006
28 Jan 2024	145	004

Solar Active Regions and flaring

Solar flaring activity was low but frequent during the last 24 hours. NOAA Active Region (AR) 3561 (magnetic configuration Beta-Gamma, Catania sunspot group 45) produced almost all the activity, including the brightest flares, two C9. NOAA AR 3561 and 3559 (magnetic configuration Beta-Gamma, Catania sunspot group 43) are expected to continue producing C-class flares, while there is a change for an isolated M-class flare in the next 24 hours.

Espulsioni di massa coronale

No Earth directed Coronal Mass Ejections (CMEs) have been observed in the available coronagraph data.

Fori coronali

Two Coronal Holes (CH) with negative polarity started crossing the central solar meridian during the past 24 hours. The first crossing took place by a northern CH, possibly connected to the pole, and the second by southern hole close to the equator. A High Speed Stream (HSS) associated with these two CH is expected to affect the Earth's environment on Jan 29.

Vento solare

The Solar Wind (SW) conditions of the last 24 hours were typical of the slow wind regime. A glancing blow from the passing of a Coronal Mass Ejection (CME) nearby only caused a very minor effect yesterday evening. The SW speed varied between 450 and 400 km/s, while the total interplanetary magnetic field (Bt) fluctuated between 4 and 10 nT and its North-South component varied between -7 and 6 nT. The interplanetary magnetic field phi angle was directed towards the Sun almost exclusively during the last 24 hours. The SW conditions are expected to be affected by another glancing blow in the next 24 hours.

Geomagnetism

Geomagnetic conditions were globally quiet (NOAA Kp 0+ to 2+), while locally they had a brief period of unsettled conditions (K BEL 0-3) during the last 24 hours. They are expected to continue at quiet levels in the next 24 hours and possibly rise to unsettled levels due to the expected arrival of a glancing blow from a Coronal Mass Ejection (CME).

Proton flux levels

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.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was well below the 1000 pfu alert threshold during the last 24 hours and is expected to to remain at this level during the next 24 hours. The 24h electron fluence was at low levels during the past 24 hours and is expected to remain at these levels for the following 24 hours.

Today's estimated international sunspot number (ISN): 083, based on 16 stations.

Solar indices for 25 Jan 2024

Wolf number Catania	108
10cm solar flux	161
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	094 - Based on 10 stations

Noticeable events summary

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

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