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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2025 Jul 14 1238 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Protoni solari

Quiet

	10cm flux	Ap
14 Jul 2025	133	014
15 Jul 2025	135	016
16 Jul 2025	135	021

Solar Active Regions and flaring

Solar flaring activity was low over the past 24 hours, with more than 10 C-class flares identified. SIDC Sunspot Group 553 (NOAA Active Region [AR] 4140, Beta magnetic configuration), SIDC Sunspot Group 555 (NOAA AR 4141, Beta magnetic configuration), and NOAA AR 4142 (Beta magnetic configuration) produced most of the activity. More C-class flaring is expected in the next 24 hours, with a small chance of an isolated M-class flare.

Espulsioni di massa coronale

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

Vento solare

During the past 24 hours the Solar Wind (SW) conditions continued to be affected by the the High Speed Stream (HSS) that arrived on 11 July and is associated with SIDC Coronal Hole 104 (positive polarity). The SW speed was initially at 660 km/s level, dropped to 480 km/s but now features an increase to around 550 km/s. The interplanetary magnetic field (B) varied between 3 and 8 nT and its North-South component (Bz) fluctuated between -6 and 6 nT. The fast SW conditions are expected to persist in the next 24 hours.

Geomagnetism

The geomagnetic conditions registered globally and locally quiet to active levels (NOAA Kp 2- to 4- and K BEL 1 to 4). In the next 24 hours they are expected to remain at the same level both globally and locally.

Proton flux levels

The greater than 10 MeV proton flux, as measured by the GOES-19 satellite, was at background levels over the past 24 hours and is likely to remain so in the next 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by GOES 19, was below but close to the 1000 pfu alert threshold. It is expected to increase in the next 24 hours and probably exceed the alert threshold. The 24-hour electron fluence was at normal levels during the past 24 hours. It is expected to increase but remain at normal levels in the next 24 hours. However, there is chance to register moderate levels in the next 24 hours.

Today's estimated international sunspot number (ISN): 142, based on 15 stations.

Solar indices for 13 Jul 2025

Wolf number Catania	///
10cm solar flux	128
AK Chambon La Forêt	031
AK Wingst	024
Estimated Ap	028
Estimated international sunspot number	129 - Based on 24 stations

Noticeable events summary

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

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