Affichage des archives de dimanche, 29 mai 2011
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 2011 May 29 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 149 publié à 2200Z le 29 May 2011IA. Analyse des régions solaires actives et activité du 28-2100Z au 29-2100Z Solar activity was moderate. At 29/1033Z, a
long-duration M1/1F flare occurred from Region 1126 (S21E54). The
flare was accompanied by a Type II (554 km/s shock velocity) radio
emission and a CME was later visible in both SOHO/LASCO and STEREO
COR2 imagery. The CME speed was estimated at 550 km/s using
plane-of-sky measurements. The CME is not expected to be
geoeffective, based on its origin. Region 1126 grew in area and
spot count over the past 24 hours. Two magnetically simple new
regions, 1127 (S19E69) and 1128 (N17E67), were numbered.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
to moderate. More C-class events are expected and there is a
continued chance of an M-class event.
IIA. Résumé de l'activité géophysique du 28-2100Z au 29-2100Z
The geomagnetic field ranged from unsettled to minor storm levels.
Solar wind speed rose above 500 km/s early in the period and ranged
between 700-800 km/s for the remainder. The Bz component of the
interplanetary magnetic field fluctuated between +7 and -9 nT. At
the same time the wind speed increased, temperature increased,
density decreased and the Phi angle became negative. These
observations were consistent with a geoeffective coronal hole high
speed stream. The greater than 2 MeV electron flux at geosynchronous
orbit reached high levels during the period.
IIB. Prévision de l'activité géophysique
The goemagnetic field is
expected to decline from predominantly unsettled to active levels on
day 1 (30 May), to quiet to unsettled levels on days 2 and 3 (31 May
- 01 Jun) as the coronal hole high speed stream wanes. There
remains a chance for isolated minor storm periods at high latitudes
on day 1.
III. Probabilité d'éruption solaire du 30 May au 01 Jun
| Classe M | 40% | 40% | 40% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 29 May 111 Prévisionnel 30 May-01 Jun 110/110/110 Moyenne des 90 derniers jours 29 May 108
V. Indice géomagnetique A
Observé Afr/Ap 28 May 032/040 Estimé Afr/Ap 29 May 025/043 Prévisionnel Afr/Ap 30 May-01 Jun 015/020-010/012-005/010
VI. Probabilités d'activité géomagnétique du 30 May au 01 Jun
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 25% | 10% | 05% |
| Tempête mineure | 10% | 05% | 01% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 20% | 05% |
| Tempête mineure | 20% | 10% | 01% |
| Tempête majeure/sévère | 10% | 05% | 01% |
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