Affichage des archives de mardi, 1 novembre 2011
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 2011 Nov 01 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 305 publié à 2200Z le 01 Nov 2011IA. Analyse des régions solaires actives et activité du 31-2100Z au 01-2100Z Solar activity was low. Newly numbered Region 1338
(S12E69) produced the largest flare of the period; a C5 flare at
31/2322Z. Another new region, responsible for M-class flare
activity on 31 October, is currently rotating into view on the
Northeast limb and was numbered Region 1339 (N22E71). A CME was
observed in SOHO/LASCO C2 imagery at 31/1700Z with the majority of
the ejecta off the Northeast limb. The CME was associated with a
disappearing solar filament (DSF) that was observed in SDO/AIA 193
imagery at 31/1426Z. STEREO B COR 2 imagery had a plane of sky
speed of approximately 503 km/s. A glancing blow from this CME is
possible early on 04 November.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
to moderate. Further M-class flares are likely from new Region
1339.
IIA. Résumé de l'activité géophysique du 31-2100Z au 01-2100Z
The geomagnetic field ranged from quiet to minor storm levels with
major and severe storm periods observed at high latitudes. At
approximately 01/0817Z, a shock arrival was observed at the ACE
spacecraft. Solar wind speed increased from approximately 370 km/s
to 420 km/s while the total magnetic field (IMF Bt) increased from 5
to 15 nT. A sudden impulse (SI) of 18 nT was observed on the
Boulder magnetometer at 01/0907Z. This event was possibly due to
transient activity associated with a DSF on 28 October.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be quiet to unsettled with isolated active periods
possible on day 1 (02 November) due to continued activity from
transient activity on 01 November. Mostly quiet conditions are
expected on days 2 - 3 (03 - 04 November).
III. Probabilité d'éruption solaire du 02 Nov au 04 Nov
| Classe M | 60% | 60% | 60% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | Green | ||
IV. Flux Penticton 10.7 cm
Observé 01 Nov 139 Prévisionnel 02 Nov-04 Nov 145/145/150 Moyenne des 90 derniers jours 01 Nov 125
V. Indice géomagnetique A
Observé Afr/Ap 31 Oct 009/008 Estimé Afr/Ap 01 Nov 015/027 Prévisionnel Afr/Ap 02 Nov-04 Nov 008/010-005/005-005/005
VI. Probabilités d'activité géomagnétique du 02 Nov au 04 Nov
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 05% | 05% |
| Tempête mineure | 05% | 01% | 01% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 05% | 05% |
| Tempête mineure | 05% | 01% | 01% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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