Affichage des archives de vendredi, 19 juillet 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 Jul 19 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 200 publié à 2200Z le 19 Jul 2002IA. Analyse des régions solaires actives et activité du 18-2100Z au 19-2100Z Solar activity was low. The day's largest event was an
unobserved C8 at 18/2317 UTC. Region 30 (N16W54) continued to
produce numerous flares, but all have been small. The region retains
a degree of magnetic complexity as it encompasses a large field of
bright plage. Region 36 (S06E26) is still impressive in white light
and h-alpha, but was unproductive.
IB. Prévisions d'activité solaire
Solar activity is expected to be
moderate. Regions 30 and 36 have the potential for M-class activity.
In addition, LASCO has seen additional backside CMEs that herald the
arrival of an active region on the SE limb. Old Region 17 (S18)
developed as it approached W limb last rotation, and produced one
X-class and 4 M-class events. It's arrival at E limb is imminent.
IIA. Résumé de l'activité géophysique du 18-2100Z au 19-2100Z
The geomagnetic field was quiet to unsettled. The solar wind has been
turbulent during the past 24 hours, with at least two shocks passing
ACE during the middle part of the period. A greater than 10 MeV
proton event began following the first shock at 19/1050 UTC. It
attained a tentative maximum of 13 pfu at 1515 UTC. Proton fluxes
are currently hovering just below 10 pfu.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be unsettled to active for the next 48 hours. A CME from
activity on 18 July is expected on 20 July, but is not expected to
have a strong impact on the geomagnetic field. Proton fluxes may
become somewhat enhanced with the shock passage.
III. Probabilité d'éruption solaire du 20 Jul au 22 Jul
| Classe M | 75% | 75% | 75% |
| Classe X | 20% | 20% | 20% |
| Proton | 50% | 50% | 20% |
| PCAF | yellow | ||
IV. Flux Penticton 10.7 cm
Observé 19 Jul 182 Prévisionnel 20 Jul-22 Jul 180/180/185 Moyenne des 90 derniers jours 19 Jul 161
V. Indice géomagnetique A
Observé Afr/Ap 18 Jul 004/008 Estimé Afr/Ap 19 Jul 008/015 Prévisionnel Afr/Ap 20 Jul-22 Jul 015/015-015/020-010/015
VI. Probabilités d'activité géomagnétique du 20 Jul au 22 Jul
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 40% | 40% | 30% |
| Tempête mineure | 15% | 15% | 10% |
| Tempête majeure/sévère | 05% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 50% | 50% | 40% |
| Tempête mineure | 20% | 20% | 15% |
| Tempête majeure/sévère | 05% | 05% | 05% |
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