Affichage des archives de mercredi, 27 novembre 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 Nov 27 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 331 publié à 2200Z le 27 Nov 2002IA. Analyse des régions solaires actives et activité du 26-2100Z au 27-2100Z Solar activity was low. The largest event of the
period was a C6/Sf from Region 198 (S18W75) at 27/0119 UTC. Four
new regions were numbered today. Of these, new Region 207 (S19E69)
is the largest and most complex, and produced five subfaint C-class
flares today. The smaller and somewhat less complex new Region 204
(N16E40) produced two similar events during the period. The other
new and existing regions on the visible disk are all small and
simply structured spot groups, and produced no observed flares
today.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
to moderate. Region 198 remains a potential source of M-class
activity until it transits the west limb on day two of the forecast
period. Region 207 appears to present an additional possible source
of moderate flare activity for the period.
IIA. Résumé de l'activité géophysique du 26-2100Z au 27-2100Z
The geomagnetic field ranged from quiet to minor storm levels. An
interplanetary shock passage was observed on the ACE spacecraft at
26/2110 UTC, in likely association with the CME activity that
occurred on 24 November. A geomagnetic sudden impulse was observed
at 26/2150 UTC (18 nT on the Boulder magnetometer) and was followed
by an isolated period of minor storming at mid and high latitudes.
Predominantly active conditions followed and persisted for most of
the remaining summary period, dropping to mainly unsettled levels
near the end. The greater than 2 MeV electron flux at
geosynchronous orbit saw a tenfold decrease from the high values
observed yesterday.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be mainly quiet to unsettled. Isolated active periods
are possible for the next 24-48 hours as the current geomagnetic
storm activity continues to wane.
III. Probabilité d'éruption solaire du 28 Nov au 30 Nov
| Classe M | 40% | 40% | 40% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 27 Nov 143 Prévisionnel 28 Nov-30 Nov 150/155/160 Moyenne des 90 derniers jours 27 Nov 171
V. Indice géomagnetique A
Observé Afr/Ap 26 Nov 006/014 Estimé Afr/Ap 27 Nov 015/024 Prévisionnel Afr/Ap 28 Nov-30 Nov 012/015-012/015-010/012
VI. Probabilités d'activité géomagnétique du 28 Nov au 30 Nov
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 25% | 25% | 20% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 30% | 30% | 25% |
| Tempête mineure | 10% | 10% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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