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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 Jul 21 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
21 Jul 2024	204	006
22 Jul 2024	206	003
23 Jul 2024	202	004

Solar Active Regions and flaring

Solar flaring activity was moderate with three M1 flares detected during the past 24 hours. NOAA Active Region (AR) 3744 (magnetic configuration Beta, Catania sunspot group no 96) produced the first two flares, an M1.5 at 20 Jul 18:49 UTC and an M1.4 at 21 Jul 03:55 UTC. NOAA AR 3751 (magnetic configuration Beta-Gamma-Delta, Catania sunspot group no 12) produced the third, an M1.5 at 21 Jul 08:34 UTC. Further M-class flaring activity is likely, mostly from the AR mentioned above, and there is a small chance of an X-class flare in the next 24 hours.

Espulsioni di massa coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Vento solare

Solar Wind (SW) conditions remained typical of the slow SW regime during the past 24 hours. The SW speed varied between 310 and 380 km/s, while the total interplanetary magnetic field (Bt) ranged between 2 and 10 nT during the past 24 hours. The North-South magnetic component (Bz) fluctuated between -4 and 6 nT, while the interplanetary magnetic field phi angle was directed predominately towards the Sun in the past 24 hours. The SW conditions are expected to follow the same pattern for the next 24 hours.

Geomagnetism

During the last 24 hours geomagnetic conditions were globally quiet (NOAA Kp 1 to 2+), while locally they had a brief period of unsettled conditions (K BEL 3 at 20 Jul 15:00-21:00 UTC). They are expected to remain quiet both globally and locally in the next 24 hours.

Proton flux levels

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is likely to remain so. Nevertheless, there is a small chance of a proton event associated with the activity of NOAA active region 3751.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain at these levels during the next 24 hours. The 24h electron fluence was at very 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): 225, based on 12 stations.

Solar indices for 20 Jul 2024

Wolf number Catania	///
10cm solar flux	207
AK Chambon La Forêt	014
AK Wingst	009
Estimated Ap	010
Estimated international sunspot number	232 - Based on 21 stations

Noticeable events summary

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

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