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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2024 Jul 20 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
20 Jul 2024	206	006
21 Jul 2024	200	004
22 Jul 2024	195	004

Solar Active Regions and flaring

Solar flaring activity was moderate with three M-class flares detected during the past 24 hours. NOAA Active Region (AR) 3751 (magnetic type Beta-Gamma-Delta, Catania sunspot group no 12) produced an M2.0 at 19 Jul 18:06 UTC and an M1.8 at 20 Jul 07:20. NOAA AR 3758 (magnetic configuration Beta, Catania sunspot group 93) emitted an M1.0 at 19 Jul 22:51 UTC. NOAA AR 3745 (magnetic configuration Beta, Catania sunspot group no 5) produced the brightest C-class flare of the past 24 hours, a C9 at 20 Jul 00:24 UTC. For the next 24 hours further M-class activity is very likely, and there is a chance of an X-class flare mostly from NOAA AR 3751.

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 400 km/s, while the total interplanetary magnetic field (Bt) ranged between 1 and 10 nT during the past 24 hours. The North-South magnetic component (Bz) fluctuated between -5 and 6 nT, while the interplanetary magnetic field phi angle was directed away and towards the Sun for an almost equal length of time in the past 24 hours. The SW conditions are expected to follow the same pattern for the next 24 hours.

Geomagnetism

Geomagnetic conditions were globally and locally quiet during the past 24 hours (NOAA Kp 1+ to 2+ and K BEL 2). They are expected to continue at quiet levels 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 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): 234, based on 13 stations.

Solar indices for 19 Jul 2024

Wolf number Catania	333
10cm solar flux	202
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	277 - Based on 26 stations

Noticeable events summary

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

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