Affichage des archives de samedi, 1 septembre 2007
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 2007 Sep 01 2203 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 244 publié à 2200Z le 01 Sep 2007IA. Analyse des régions solaires actives et activité du 31-2100Z au 01-2100Z Solar activity was very low. No flares were observed
during the past 24 hours. New Region 970 (S06W07) was assigned today
and is a small, C-type sunspot group. A filament eruption on the
west limb was observed beginning at about 31/2000Z in Stereo-A EUVI
images and was later seen as a limb CME in the Stereo-A COR1 and
COR2 coronagraphs just after 01/0000Z.
IB. Prévisions d'activité solaire
Solar activity is expected to be very
low.
IIA. Résumé de l'activité géophysique du 31-2100Z au 01-2100Z
The geomagnetic field was mostly quiet to unsettled. There was an
isolated active period from 0900-1200Z. Real-time solar wind
measurements at the ACE spacecraft show a slow increase in speed
over the last 24 hours, from initial values around 420 km/s to about
520 km/s by forecast issue time. The increase is consistent with a
high speed stream from a favorably positioned coronal hole. The
greater than 2 MeV electron flux at geosynchronous orbit was at high
levels from 31/2100-31/2115 but was dropped below 1000 PFU for the
remainder of the period.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be unsettled to active for the next 24 hours (02
September) as the high speed solar wind stream is expected to
continue. Conditions should subside to mostly unsettled for the
second day (03 September), and should be quiet to unsettled by the
third day (04 September).
III. Probabilité d'éruption solaire du 02 Sep au 04 Sep
| Classe M | 01% | 01% | 01% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Flux Penticton 10.7 cm
Observé 01 Sep 071 Prévisionnel 02 Sep-04 Sep 071/070/070 Moyenne des 90 derniers jours 01 Sep 071
V. Indice géomagnetique A
Observé Afr/Ap 31 Aug 007/007 Estimé Afr/Ap 01 Sep 015/015 Prévisionnel Afr/Ap 02 Sep-04 Sep 013/020-010/012-005/008
VI. Probabilités d'activité géomagnétique du 02 Sep au 04 Sep
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 35% | 35% | 15% |
| Tempête mineure | 15% | 15% | 05% |
| Tempête majeure/sévère | 05% | 05% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 30% | 15% |
| Tempête mineure | 20% | 15% | 05% |
| Tempête majeure/sévère | 10% | 10% | 01% |
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