Affichage des archives de vendredi, 18 avril 2003
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 2003 Apr 18 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 108 publié à 2200Z le 18 Apr 2003IA. Analyse des régions solaires actives et activité du 17-2100Z au 18-2100Z Solar activity has been at moderate levels. There were
several minor C-class events during the last 24 hours with a single
M1.1 from Region 337 (S12E74) at 1958 UTC. A 13 degree disappearing
solar filament was observed early in the period near Region 335
(S25E21). There was a small coronal mass ejection associated with
that filament, but it was not earth-directed.
IB. Prévisions d'activité solaire
Solar activity is expected to be at
low to moderate levels for the entire period. Region 337 (S12E74)
is just coming on to the visible disk, and appears in solar x-ray
imagery to be a potentially active region.
IIA. Résumé de l'activité géophysique du 17-2100Z au 18-2100Z
The geomagnetic field was at unsettled to active levels with an
isolated quiet period from 0300 UTC to 0600 UTC. The coronal hole
induced high speed solar wind stream continues. The greater than 2
MeV electron fluxes at geo-synchronous orbit reached high levels
today.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be at mostly unsettled levels as the current disturbance
continues to transition out of geoeffective range. Continued
unsettled levels are expected through day two, with a further
decrease to mostly quiet levels on day three.
III. Probabilité d'éruption solaire du 19 Apr au 21 Apr
| Classe M | 05% | 05% | 05% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 18 Apr 108 Prévisionnel 19 Apr-21 Apr 110/110/115 Moyenne des 90 derniers jours 18 Apr 127
V. Indice géomagnetique A
Observé Afr/Ap 17 Apr 020/030 Estimé Afr/Ap 18 Apr 018/019 Prévisionnel Afr/Ap 19 Apr-21 Apr 012/015-010/012-007/010
VI. Probabilités d'activité géomagnétique du 19 Apr au 21 Apr
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 35% | 30% | 30% |
| Tempête mineure | 25% | 15% | 15% |
| Tempête majeure/sévère | 05% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 30% | 30% |
| Tempête mineure | 30% | 25% | 20% |
| Tempête majeure/sévère | 20% | 10% | 10% |
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