Affichage des archives de jeudi, 5 janvier 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 Jan 05 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 005 publié à 2200Z le 05 Jan 2012IA. Analyse des régions solaires actives et activité du 04-2100Z au 05-2100Z Solar activity has been at low levels for the past 24
hours with two C-class events observed. The first C-class
flare was from Region 1390 (N09W71), which had an associated Type II
radio sweep with an estimated shock speed of 695 km/s. Due to the
location of this region, and the lack of a CME in imagery, no Earth
impacts are expected. The second C-class flare was a long duration
C2 flare at 05/1238Z from an eruptive filament channel, located
around Region 1392 (N21W19). The associated CME can be seen in
STEREO ahead and behind imagery and is not expected to impact
Earth. Finally, a new Region emerged on the disk early in the period
and was numbered as Region 1393 (N18W03).
IB. Prévisions d'activité solaire
Solar activity is expected to be at
low levels with a slight chance for M-class flares for the next
three days (06 - 08 January).
IIA. Résumé de l'activité géophysique du 04-2100Z au 05-2100Z
The geomagnetic field has been at predominantly quiet levels for the
past 24 hours. From 05/1200-1500Z, the mid latitudes observed
unsettled conditions while an isolated period at minor storm levels
was observed at high latitudes. This small increase in activity was
due to a sustained period of the negative Bz component of the
Interplanetary Magnetic Field. Solar wind speeds, as measured by the
ACE spacecraft, fluctuated around 340 km/s throughout the period.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be at mostly quiet levels on day one (06 January),
unsettled to active levels with a slight chance for minor storm
levels at high latitudes on day two (07 January) and predominantly
unsettled levels on day three (08 January). The increase in activity
is due to the arrival of a coronal hole high speed stream.
III. Probabilité d'éruption solaire du 06 Jan au 08 Jan
| Classe M | 10% | 10% | 10% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 05 Jan 141 Prévisionnel 06 Jan-08 Jan 140/140/140 Moyenne des 90 derniers jours 05 Jan 145
V. Indice géomagnetique A
Observé Afr/Ap 04 Jan 003/002 Estimé Afr/Ap 05 Jan 004/005 Prévisionnel Afr/Ap 06 Jan-08 Jan 005/008-014/010-010/012
VI. Probabilités d'activité géomagnétique du 06 Jan au 08 Jan
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 30% | 30% |
| Tempête mineure | 01% | 10% | 10% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 25% |
| Tempête mineure | 20% | 35% | 10% |
| Tempête majeure/sévère | 10% | 40% | 01% |
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