Affichage des archives de vendredi, 23 novembre 2012
Rapport d'activité solaire
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Rapport d'activité solaire et géophysique 2012 Nov 23 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 328 publié à 2200Z le 23 Nov 2012IA. Analyse des régions solaires actives et activité du 22-2100Z au 23-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
23/1212Z from Region 1618 (N08W27). Although this region retained its
beta-gamma-delta magnetic characteristics, it experienced intermediate
penumbral decay. All other regions on the disk remained stable and
quiet. Between 1200 and 1300Z, a 29 degree filament was observed in SDO
AIA 304 imagery lifting off from the southeast limb. The subsequent CME
was observed in STEREO-A and B COR2 imagery beginning around 1400Z.
Using geometric localization, a preliminary speed of approximately 550
km/s was obtained. This suggests an arrival at earth early on 27
November.
IB. Prévisions d'activité solaire
Solar activity is expected to be at low
levels, with a slight chance for moderate activity, for the entire
forecast period (24-26 Nov).
IIA. Résumé de l'activité géophysique du 22-2100Z au 23-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
at the ACE spacecraft reached 389km/s at 23/2117Z. Total IMF reached 12
nT at 23/2116Z. The maximum southward component of Bz was -8.8 nT at
23/2112Z. These values coincided with the arrival of an interplanetary
shock at ACE around 23/2112Z from the 20 Nov CME. The greater than 2
MeV electron flux at geosynchronous orbit reached a maximum of 1408 pfu.
IIB. Prévision de l'activité géophysique
Geomagnetic field activity is
expected to begin at active levels and reach major storm levels early on
day one (24 Nov) with the effects from the 20 Nov CME coupled with the
anticipated arrival of the 21 Nov CME. On day two (25 Nov), conditions
are expected to return to unsettled to active levels due to residual CME
effects combined with a coronal hole high speed stream. The unsettled
levels may persist into day three (26 November).
III. Probabilité d'éruption solaire du 24 Nov au 26 Nov
| Classe M | 20% | 20% | 20% |
| Classe X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 23 Nov 126 Prévisionnel 24 Nov-26 Nov 125/120/115 Moyenne des 90 derniers jours 23 Nov 123
V. Indice géomagnetique A
Observé Afr/Ap 22 Nov 001/001 Estimé Afr/Ap 23 Nov 005/007 Prévisionnel Afr/Ap 24 Nov-26 Nov 023/090-013/018-006/005
VI. Probabilités d'activité géomagnétique du 24 Nov au 26 Nov
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 35% | 30% | 05% |
| Tempête mineure | 30% | 15% | 01% |
| Tempête majeure/sévère | 10% | 05% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 10% | 15% | 15% |
| Tempête mineure | 20% | 30% | 10% |
| Tempête majeure/sévère | 65% | 50% | 05% |
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