Affichage des archives de samedi, 17 janvier 2004
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 2004 Jan 17 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 017 publié à 2200Z le 17 Jan 2004IA. Analyse des régions solaires actives et activité du 16-2100Z au 17-2100Z Solar activity reached high levels this period. Region
540 (S14E15), the source of several low C-class flares throughout
the period, produced an M5 flare at 17/1750Z. Moderate to strong
radio bursts accompanied this flare, including a 580 sfu Tenflare
and an extraordinary 270,000 sfu burst on 245 MHz (observed at both
Sagamore Hill and Palehua observatories). A Type II radio sweep (784
km/s) was also observed. Region 540 is a moderate size group of
approximately 350 millionths of white light areal coverage with
minor magnetic mixing. Region 537 (N04W70) continues in a slow decay
phase as it approaches the west limb. Isolated C-class activity was
observed from this region. No other significant activity was noted.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
to moderate. Isolated M-class activity is possible from Region 540.
IIA. Résumé de l'activité géophysique du 16-2100Z au 17-2100Z
The geomagnetic field was quiet to active. A coronal hole high speed
stream is responsible for the weak disturbed periods. The IMF Bz was
predominantly northward which offset the geomagnetic effects of the
high speed flow. The greater than 2 MeV electron flux at
geosynchronous orbit was at high levels today.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to continue at quiet to active levels through 18 January as
the high speed stream subsides. Quiet to unsettled conditions are
expected on 19 January. A disturbance associated with today's M5
flare, is expect to begin on 20 January. Active to minor storm
conditions are expected.
III. Probabilité d'éruption solaire du 18 Jan au 20 Jan
| Classe M | 20% | 20% | 20% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 17 Jan 123 Prévisionnel 18 Jan-20 Jan 125/120/110 Moyenne des 90 derniers jours 17 Jan 139
V. Indice géomagnetique A
Observé Afr/Ap 16 Jan 021/026 Estimé Afr/Ap 17 Jan 015/016 Prévisionnel Afr/Ap 18 Jan-20 Jan 015/015-010/012-020/020
VI. Probabilités d'activité géomagnétique du 18 Jan au 20 Jan
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 25% | 20% | 30% |
| Tempête mineure | 10% | 05% | 20% |
| Tempête majeure/sévère | 01% | 01% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 30% | 25% | 35% |
| Tempête mineure | 15% | 10% | 25% |
| Tempête majeure/sévère | 05% | 05% | 10% |
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