Affichage des archives de vendredi, 9 mars 2012
Rapport d'activité solaire
Chaque éruption solaire mentionnée dans ce rapport a été ajustée selon un facteur d'échelle fourni par le Space Weather Prediction Center (SWPC). Ce facteur a conduit à une sous-estimation de 42% des éruptions solaires par rapport aux données de qualité scientifique. Nous avons supprimé ce facteur d'échelle de nos données archivées pour refléter les véritables unités physiques.
Rapport d'activité solaire et géophysique 2012 Mar 09 2210 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
**********CORRECTED COPY********** SDF numéro 069 publié à 2200Z le 09 Mar 2012IA. Analyse des régions solaires actives et activité du 08-2100Z au 09-2100Z Solar activity reached high levels today. Region 1429
(N18W13) produced an M6 flare at 09/0353Z. Associated with this
event was Type II (1285 km/s) and Type IV radio sweeps along with a
full halo CME first seen in SOHO/LASCO C2 imagery at 09/0426Z. The
CME had an estimated plane-of-sky speed of 850 km/s in STEREO B COR2
imagery. Separation and slight decay within the intermediate area
was observed in Region 1429, however it still remained a large Ekc
spot group with a Beta-Gamma-Delta magnetic configuration. A new
spot group rotated onto the NE limb and was numbered Region 1432
(N18E69). This new region is too close to the limb to accurately
determine the spot and magnetic classification, however it produced
a C9 flare at 09/2025Z.
IB. Prévisions d'activité solaire
Solar activity is expected to continue
at low to moderate levels with a chance for X-class activity from
Region 1429 for the next three days (10 - 12 March).
IIA. Résumé de l'activité géophysique du 08-2100Z au 09-2100Z
The geomagnetic field was at active to severe storm conditions due to
continued activity from the sheath region associated with the 07
March CME. At approximately 09/0049Z, the Bz component of the
interplanetary magnetic field started to rotate towards a more
magnetically connected polarity. Bz continued to be negative for
several hours reaching values near -17 nT with an approximate solar
wind speed over 600 km/s. The geomagnetic field responded with
major to severe storm periods during the periods 09/0300 - 1500Z.
Solar wind remained elevated around 600 km/s by the end of the
period. The greater than 10 MeV proton event that began at 07/0510Z
is ongoing. The greater than 100 MeV proton event that began at
07/0405 is ongoing.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be under the influence of the current CME through early
on day 1. Unsettled to active conditions, with isolated minor storm
periods, are possible is expected as the CME continues to wane.
Early to mid-day on day 2 (11 March), the CME associated with
todays M-6 flare is expected to become geoeffective. Active to
severe storm periods are expected with this event. Unsettled to
active conditions, with isolated minor storm periods, are possible
on day 3 (12 March) as conditions are expected to slowly dissipate.
III. Probabilité d'éruption solaire du 10 Mar au 12 Mar
| Classe M | 80% | 80% | 80% |
| Classe X | 40% | 40% | 40% |
| Proton | 99% | 99% | 60% |
| PCAF | red | ||
IV. Flux Penticton 10.7 cm
Observé 09 Mar 146 Prévisionnel 10 Mar-12 Mar 150/150/150 Moyenne des 90 derniers jours 09 Mar 125
V. Indice géomagnetique A
Observé Afr/Ap 08 Mar 021/028 Estimé Afr/Ap 09 Mar 046/073 Prévisionnel Afr/Ap 10 Mar-12 Mar 015/022-033/070-017/030
VI. Probabilités d'activité géomagnétique du 10 Mar au 12 Mar
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 30% | 30% |
| Tempête mineure | 20% | 35% | 20% |
| Tempête majeure/sévère | 05% | 20% | 10% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 20% | 40% |
| Tempête mineure | 25% | 30% | 30% |
| Tempête majeure/sévère | 15% | 50% | 25% |
Toutes les heures sont indiquées en UTC
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| Dernière classe X | 08/12/2025 | X1.1 |
| Dernière classe M | 21/12/2025 | M1.3 |
| Dernier orage géomagnétique | 22/12/2025 | Kp5 (G1) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
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|---|---|
| novembre 2025 | 91.8 -22.8 |
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