Affichage des archives de mardi, 4 septembre 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 Sep 04 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 248 publié à 2200Z le 04 Sep 2012IA. Analyse des régions solaires actives et activité du 03-2100Z au 04-2100Z Solar activity was low. Region 1564 (S14E14 -
Esi/beta-gamma) was the most active region, producing occasional
low-level C-class flares. It increased in spot count and area during
the first half of the period, but showed gradual spot and penumbral
decay during the latter half of the period. Region 1560 (N04W47 -
Eai/beta-gamma-delta) showed a slight decrease in spots and area,
but maintained a delta in its interior spots. No significant changes
were observed in the remaining spotted regions and no new regions
were numbered. No Earth-directed CME activity was observed during
the period.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
through the period (05 - 07 September) with a chance for an isolated
M-class flare.
IIA. Résumé de l'activité géophysique du 03-2100Z au 04-2100Z
Geomagnetic field activity ranged from quiet to minor storm levels
with major storm periods detected at high latitudes, all due to
residual CME effects. The greater than 10 MeV proton event at
geosynchronous orbit that began at 01/1335Z, reached a maximum of 59
pfu at 02/0850Z, and ended at 04/0625Z.
IIB. Prévision de l'activité géophysique
Geomagnetic field activity is
expected to be at quiet to unsettled levels during days 1 - 2 (05 -
06 September) with a chance for active levels. This is due to the
arrival of CMEs observed on 02 September along with a co-rotating
interaction region in advance of a coronal hole high-speed stream
(CH HSS). The CMEs are expected to arrive around midday on day 1.
The CH HSS is expected to commence on day 2. Field activity is
expected to be at quiet to unsettled levels on day 3 (07 September)
as CH HSS effects subside.
III. Probabilité d'éruption solaire du 05 Sep au 07 Sep
| Classe M | 25% | 25% | 25% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 04 Sep 138 Prévisionnel 05 Sep-07 Sep 135/135/130 Moyenne des 90 derniers jours 04 Sep 124
V. Indice géomagnetique A
Observé Afr/Ap 03 Sep 023/040 Estimé Afr/Ap 04 Sep 012/014 Prévisionnel Afr/Ap 05 Sep-07 Sep 010/012-010/010-007/008
VI. Probabilités d'activité géomagnétique du 05 Sep au 07 Sep
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 20% | 15% | 15% |
| Tempête mineure | 05% | 05% | 01% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 15% |
| Tempête mineure | 30% | 20% | 25% |
| Tempête majeure/sévère | 30% | 25% | 20% |
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