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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Feb 25 1231 UTC

Prévisions SIDC

Éruptions solaires

Quiet conditions (<50% probability of C-class flares)

Géomagnétisme

Quiet (A<20 and K<4)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
25 Feb 2026	125	016
26 Feb 2026	128	008
27 Feb 2026	130	008

Régions solaires actives et éruptions solaires

Solar flaring activity was low over the past 24 hours, with only C-class flares. The strongest flare was a C5.3 flare (SIDC Flare 7067) peaking at 00:45 UTC on February 25. There is currently one numbered active region on the solar disk, SIDC Sunspot Group 800 (magnetic type alpha), which has rotated on disc from the east limb, in the northeast quadrant. The solar flaring activity is expected to be low over the next 24 hours, with a chance for C-class flares.

Éjection de masse coronale

No Earth-directed Coronal Mass Ejections (CMEs) were observed in the available coronagraph imagery in the last 24 hours.

Vent solaire

Over the past 24 hours, the solar wind parameters (ACE) are gradually returning to the slow solar wind regime, under the waning influence of the high-speed stream from the recurrent, negative polarity, equatorial, coronal hole (SIDC Coronal Hole 147). The solar wind speed decreased from approximately 630 km/s to the current value of approximately 530 km/s. The interplanetary magnetic field values were between 3 nT and 5 nT. The Bz component varied between -5 nT and 5 nT. The interplanetary magnetic field angle was mostly in the negative sector. Mostly slow solar wind conditions are expected over the next 24 hours.

Géomagnétisme

Geomagnetic conditions globally were mostly at quiet to unsettled levels (NOAA Kp 2 to 3), with an interval of active conditions (NOAA Kp 4- ) between 00:00 UTC and 03:00 UTC on February 25. Geomagnetic conditions locally were mostly at quiet to unsettled levels (K BEL 2 to 3), with an interval of active conditions (KBEL 4) between 19:00 UTC and 23:00 UTC on February 24. Mostly quiet to unsettled conditions are expected globally and locally over the next 24 hours.

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the 10 pfu threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours.

Flux d'électrons sur l'orbite géostationnaire

The greater than 2 MeV electron flux measured by GOES 19 was above the 1000 pfu threshold in the last 24 hours. The greater than 2 MeV electron flux measured by GOES 18 was mostly above the 1000 pfu threshold in the last 24 hours and fell below the 1000 pfu threshold between 06:00 UTC and 11:00 UTC on February 25. The greater than 2 MeV electron flux is expected to remain around the 1000 pfu threshold levels in the next 24 hours. The 24-hour electron fluence is presently at moderate levels and is expected to remain so over the next 24 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 016, sur la base de 17 stations.

Indices solaires pour 24 Feb 2026

Nombre de Wolf, observé par Catania	000
Flux solaire à 10 cm	120
AK Chambon La Forêt	023
AK Wingst	018
Ap estimé	018
Nombre international de taches solaires estimé	003 - Basé sur 17 stations

Résumé des événements marquants

Données fournies par le Solar Influences Data analysis Center© - SIDC - Traité par SpaceWeatherLive

Toutes les heures sont indiquées en UTC

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