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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 May 23 1231 UTC

SIDC Forecast

Brillamenti solari

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Warning condition (activity levels expected to increase, but no numeric forecast given)

10cm fluxAp
23 May 2024196007
24 May 2024194011
25 May 2024192010

Solar Active Regions and flaring

There are six visible ARs on the solar disk. There were four M-class flares in the last 24 hours, from NOAA 3679 (that evolved into beta-gamma-delta magnetic field configuration). The strongest one was an M4.2 peaking at 02:16 UTC. NOAA AR 3683 rotated over the west limb, but is still producing significant flares (C9.8 at 07:01 UTC). NOAA AR 3685 (beta gamma magnetic field configuration) has also potential for strong flaring activity. For the next 24 hours, more M-class flares can be expected and X-class flares are possible.

Espulsioni di massa coronale

No Earth directed CME has been observed in the last 24 hours.

Fori coronali

A negative polarity coronal hole in the northern hemisphere has developed a low latitudinal extension that traversed the central meridian on 21 May. A possible arrival of high speed steam from this coronal hole could arrive at the Earth (late) on 24 May.

Vento solare

The solar wind at the Earth is slow, with speeds around 400 km/s and interplanetary magnetic field around 7 nT. Similar conditions can be expected for the next 24 hours.

Geomagnetism

Geomagnetic conditions have been quiet in the last 24 hours (Kp and K_BEL up to 2). Similar quiet conditions can be expected for the next 24 hours.

Proton flux levels

The 10 MeV GOES-18 proton flux was below threshold in the past 24 hours. Since some of the regions producing the M-class flaring are close to the west limb, a proton event cannot be discarded in the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux from GOES 16 was below the threshold level in the last 24 hours. It is expected to remain below the threshold during the next 24 hours. The electron fluence was at normal levels for the last 24 hours and is expected to remain so.

Today's estimated international sunspot number (ISN): 135, based on 15 stations.

Solar indices for 22 May 2024

Wolf number Catania188
10cm solar flux196
AK Chambon La Forêt008
AK Wingst005
Estimated Ap004
Estimated international sunspot number151 - Based on 21 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
22135114051412S06W55M1.2SF06/3679
23020502160226----M4.206/3679
23040304290454S09W18M1.7SF06/3679VI/2

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

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Notizie sul meteo spaziale

Ultimo brillamento X2025/03/28X1.1
Ultimo brillamento M2025/04/01M2.5
Ultima tempesta geomagnetica2025/03/27Kp5 (G1)
Giorni senza macchie
Ultimo giorno senza macchie2022/06/08
Media mensile Numero di Macchie Solari
marzo 2025134.2 -20.4
aprile 2025143 +8.8
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