Affichage des archives de mercredi, 28 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 28 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 333 publié à 2200Z le 28 Nov 2012IA. Analyse des régions solaires actives et activité du 27-2100Z au 28-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
27/2126Z from Region 1620 (S12W57). The region continued to grow in
areal coverage and maintained a beta-gamma-delta configuration. Region
1623 (N09E60) also grew significantly in areal coverage but the magnetic
complexity is difficult to determine with its proximity to the limb.
There are currently 4 numbered sunspot regions on the disk. No
Earth-directed CMEs were observed during the period.
IB. Prévisions d'activité solaire
Solar activity is expected to be at low to
moderate levels on days one, two, and three (29 Nov, 30 Nov, 01 Dec).
IIA. Résumé de l'activité géophysique du 27-2100Z au 28-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 448 km/s at
28/0119Z and has since decreased to nominal levels.
IIB. Prévision de l'activité géophysique
The geomagnetic field is expected
to remain quiet through the majority of 29 Nov. Quiet to unsettled
conditions with a chance for active periods are expected to begin late
on day one (around 29/1800Z) with the anticipated arrival of the 26 and
27 Nov CMEs. Activity is expected to return to mostly quiet levels by
the latter half of day two (30 Nov) as the effects from the CMEs
subside. Isolated unsettled periods are possible through day three (01
Dec) due to coronal hole high speed stream effects.
III. Probabilité d'éruption solaire du 29 Nov au 01 Dec
| Classe M | 35% | 35% | 35% |
| Classe X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 28 Nov 114 Prévisionnel 29 Nov-01 Dec 110/105/105 Moyenne des 90 derniers jours 28 Nov 123
V. Indice géomagnetique A
Observé Afr/Ap 27 Nov 003/004 Estimé Afr/Ap 28 Nov 002/002 Prévisionnel Afr/Ap 29 Nov-01 Dec 009/011-012/015-007/008
VI. Probabilités d'activité géomagnétique du 29 Nov au 01 Dec
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 20% | 40% | 10% |
| Tempête mineure | 10% | 20% | 05% |
| Tempête majeure/sévère | 01% | 05% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 10% | 15% |
| Tempête mineure | 25% | 25% | 15% |
| Tempête majeure/sévère | 30% | 55% | 15% |
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