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Bulletin quotidien sur l'activité solaire et géomagnétique du SIDC

Publié: 2026 Mar 08 1231 UTC

Prévisions SIDC

Éruptions solaires

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

Géomagnétisme

Minor storm expected (A>=30 or K=5)

Moniteur de Flux de Proton

Quiet

	Flux de 10 cm	Ap
08 Mar 2026	134	022
09 Mar 2026	132	015
10 Mar 2026	130	007

Régions solaires actives et éruptions solaires

Solar flaring activity has been low over the past 24 hours, with few C-class flares. The strongest flare was a C1.2 flare (SIDC Flare 7140), peaking at 04:43 UTC on March 08, associated with SIDC Sunspot Group 762 (magnetic type beta). There are currently five numbered active regions on the solar disk. The most complex one is SIDC Sunspot Group 804 (NOAA Active Region 4381, magnetic type beta-gamma). SIDC Sunspot Group 812 (NOAA Active Region 4386) has rotated behind the west limb. SIDC Sunspot Group 762 has rotated on disk from the east limb, in the northeast quadrant. The solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares.

Éjection de masse coronale

A narrow Coronal Mass Ejection (SIDC CME 638) was observed in LASCO/C2 coronagraph imagery, lifting off from the northeast limb starting from 02:30 UTC on March 08. It is likely associated with a prominence eruption over the northeast limb and it is not expected to impact Earth. No other Earth-directed CMEs were observed in the available coronagraph imagery during the last 24 hours.

Trous coronaux

The northern, mid-latitude, negative polarity coronal hole (returning SIDC Coronal Hole 142) has been crossing the central meridian since March 05.

Vent solaire

Over the last 24 hours, the solar wind parameters (ACE and DSCOVR) were enhanced, likely due to the arrival of a high-speed stream from the northern, mid-latitude, negative polarity coronal hole (SIDC Coronal Hole 142), which crossed the central meridian on March 05. The solar wind speed initially increased from 350 km/s to 680 km/s and is currently around 580 km/s. The interplanetary magnetic field initially decreased from 12 nT to 5 nT and is currently around 8 nT. The Bz component varied between -6 nT and 6 nT. The interplanetary magnetic field angle phi was predominantly in the negative sector. Enhanced solar wind conditions are expected over the next 24 hours, under the continuous influence of the high-speed stream from SIDC Coronal Hole 142.

Géomagnétisme

Geomagnetic conditions globally were mostly active (NOAA Kp 4) during the last 24 hours, with an interval of minor storm levels between 00:00 UTC and 03:00 UTC on March 08. Geomagnetic conditions locally were mostly active (K Bel 4), reaching minor storm levels between 01:00 UTC 03:00 UTC on March 08. The geomagnetic storms are possibly linked to a high-speed stream arrival, from the northern, mid-latitude, negative polarity coronal hole (SIDC Coronal Hole 142). Mostly active conditions, with possible isolated minor storm intervals, are expected over the next 24 hours, due to the ongoing influence of the high-speed stream from SIDC Coronal Hole 142.

Niveaux de flux de protons

The greater than 10 MeV proton flux was below the 10 pfu threshold during the last 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 18 and GOES 19 was below the 1000 pfu threshold during the last 24 hours and it is expected to gradually increase over the next 24 hours. The 24-hour electron fluence was at normal levels and it is expected remain so over the next 24 hours, with an increase to moderate levels possible in the next 48 hours.

Estimation du nombre international de taches solaires (ISN) pour aujourd'hui : 077, sur la base de 14 stations.

Indices solaires pour 07 Mar 2026

Nombre de Wolf, observé par Catania	///
Flux solaire à 10 cm	135
AK Chambon La Forêt	037
AK Wingst	020
Ap estimé	021
Nombre international de taches solaires estimé	082 - Basé sur 19 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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