Affichage des archives de mercredi, 8 août 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 Aug 08 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 221 publié à 2200Z le 08 Aug 2012IA. Analyse des régions solaires actives et activité du 07-2100Z au 08-2100Z Solar activity was low. Region 1542 (S14E50) remained
the most active region on the solar disk, producing seven C-class
flares. The largest of these flares was a C4/Sf flare that occurred
at 08/1132Z. A large portion of a filament erupted from the
southwest quadrant beginning around 08/0200Z. A slow coronal mass
ejection (CME) (estimated plane-of-sky speed 346 km/s) was first
observed off the west limb in SOHO/LASCO C2 imagery at 08/0612Z and
was likely associated with the filament eruption. The bulk of the
CME material did not appear to be Earth-directed.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
with a slight chance for an isolated M-class flare.
IIA. Résumé de l'activité géophysique du 07-2100Z au 08-2100Z
The geomagnetic field was quiet to unsettled with an active period
from 08/0000-0300Z. Indications of a solar sector boundary crossing
were evident on the ACE spacecraft as sustained southward IMF Bz and
enhanced IMF Bt occurred prior to the active period. ACE EPAM data
indicated the beginning of a slow rise in energetic particles at
approximately 08/1200Z. This rise is likely associated with the
anticipated glancing blow from the 04 Aug CME.
IIB. Prévision de l'activité géophysique
Geomagnetic activity is
expected to be quiet to unsettled with a slight chance for isolated
active to minor storm periods early on day one (09 Aug). Activity
should return to quiet to unsettled late in the day as effects of
the CME wane. Days two and three (10 and 11 Aug) are expected to be
at predominately quiet levels.
III. Probabilité d'éruption solaire du 09 Aug au 11 Aug
| Classe M | 15% | 15% | 15% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Flux Penticton 10.7 cm
Observé 08 Aug 133 Prévisionnel 09 Aug-11 Aug 130/130/125 Moyenne des 90 derniers jours 08 Aug 128
V. Indice géomagnetique A
Observé Afr/Ap 07 Aug 008/008 Estimé Afr/Ap 08 Aug 009/010 Prévisionnel Afr/Ap 09 Aug-11 Aug 011/010-006/005-006/005
VI. Probabilités d'activité géomagnétique du 09 Aug au 11 Aug
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 20% | 05% | 05% |
| Tempête mineure | 05% | 01% | 01% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 15% |
| Tempête mineure | 30% | 15% | 15% |
| Tempête majeure/sévère | 25% | 05% | 05% |
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