Affichage des archives de vendredi, 5 avril 2002
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 2002 Apr 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 095 publié à 2200Z le 05 Apr 2002IA. Analyse des régions solaires actives et activité du 04-2100Z au 05-2100Z Solar activity was at low levels. Several weak C-class
flares occurred throughout the period, from sources including most
of the larger active regions on the visible disk. The largest event
of the period was a C4/Sf at 04/2306 UTC, from a source near newly
numbered Region 9895 (N06E58). Two other regions were numbered
today, 9894 (N14W09), and 9896 (S11E74). Newly numbered Region 9896
appears to be the return of old Region 9866, which was a source of
several energetic flares on its last transit. It now appears as a
large, single polarity spot (possibly the leading spot of a large
bipolar group), though lacks any evident bright plage area as would
be expected for an energetic region. It's present position near the
east limb prevents detailed analysis.
IB. Prévisions d'activité solaire
Solar activity is expected to be
predominantly low to moderate, though a chance for an isolated major
flare exists, particularly for the emergent regions near the east
limb.
IIA. Résumé de l'activité géophysique du 04-2100Z au 05-2100Z
The geomagnetic field was predominantly quiet, with an isolated
unsettled period observed at higher latitudes during 05/1800-2100
UTC. The greater than 2 MeV electron flux observed at
geosynchronous orbit was again at high levels today.
IIB. Prévision de l'activité géophysique
Geomagnetic activity is
expected to be mainly quiet to unsettled. A chance for isolated
active periods exists for days two and three of the forecast period.
Greater than 2 MeV electron flux is expected to remain above event
threshold for most of the period.
III. Probabilité d'éruption solaire du 06 Apr au 08 Apr
| Classe M | 60% | 60% | 60% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 05 Apr 217 Prévisionnel 06 Apr-08 Apr 215/210/205 Moyenne des 90 derniers jours 05 Apr 203
V. Indice géomagnetique A
Observé Afr/Ap 04 Apr 006/008 Estimé Afr/Ap 05 Apr 004/006 Prévisionnel Afr/Ap 06 Apr-08 Apr 008/008-010/010-012/012
VI. Probabilités d'activité géomagnétique du 06 Apr au 08 Apr
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 15% | 20% |
| Tempête mineure | 01% | 01% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 20% |
| Tempête mineure | 01% | 01% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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