Affichage des archives de lundi, 3 septembre 2012
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 2012 Sep 03 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 247 publié à 2200Z le 03 Sep 2012IA. Analyse des régions solaires actives et activité du 02-2100Z au 03-2100Z Solar activity was low. Regions 1560 (N03W33 -
Eki/beta-gamma-delta) and 1564 (S16E26 - Esi/beta-gamma) each
produced occasional C-class flares. Region 1560 increased in
magnetic complexity to a beta-gamma-delta configuration with a delta
evident in its interior spots. Region 1564 was in a gradual growth
phase during the period and increased in magnetic complexity to a
beta-gamma configuration. Region 1553 (S21W82 - Dso/beta) produced
occasional optical subflares as it neared the west limb. New Region
1566 (N24E76 - Hax/alpha) was numbered. There were no Earth-directed
coronal mass ejections (CME) observed during the period.
IB. Prévisions d'activité solaire
Solar activity is expected to be low
through the period (04 - 06 September) with a chance for isolated M-
class flares.
IIA. Résumé de l'activité géophysique du 02-2100Z au 03-2100Z
Geomagnetic field activity ranged from unsettled to major storm
levels with a brief period of severe storm levels detected at high
latitudes. An interplanetary shock passed the ACE spacecraft at
03/1123Z indicating the arrival of the Halo CME observed on 31
August. This was followed by a geomagnetic sudden impulse at
03/1214Z (28 nT, Boulder USGS Magnetometer). Field activity
increased to major storm levels during 03/1200 - 1500Z following the
sudden impulse, then decreased to active levels for the rest of the
period, with minor storm periods detected at high latitudes. The greater than 10 MeV proton event at geosynchronous orbit
that began at 01/1335Z, reached a maximum of 60 pfu at 02/0850Z, and
was in progress as the period ended.
IIB. Prévision de l'activité géophysique
Geomagnetic field activity is
expected to be at unsettled to active levels on day 1 (04 September)
with a chance for minor storm levels as CME effects wind down. Quiet
to unsettled conditions are expected during days 2 - 3 (05 - 06
September) with a chance for active levels due to arrival of
Earth-directed CMEs observed on 02 September along with a
co-rotating interaction region ahead of a coronal hole high-speed
stream (CH HSS). The CH HSS is expected to commence on day 3. The
greater than 10 MeV proton event at geosynchronous orbit is expected
to end on day 1.
III. Probabilité d'éruption solaire du 04 Sep au 06 Sep
| Classe M | 30% | 30% | 30% |
| Classe X | 05% | 05% | 05% |
| Proton | 50% | 30% | 10% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 03 Sep 142 Prévisionnel 04 Sep-06 Sep 140/140/135 Moyenne des 90 derniers jours 03 Sep 124
V. Indice géomagnetique A
Observé Afr/Ap 02 Sep 014/015 Estimé Afr/Ap 03 Sep 021/028 Prévisionnel Afr/Ap 04 Sep-06 Sep 014/015-010/012-009/010
VI. Probabilités d'activité géomagnétique du 04 Sep au 06 Sep
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 20% | 20% |
| Tempête mineure | 20% | 05% | 05% |
| Tempête majeure/sévère | 05% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 15% |
| Tempête mineure | 15% | 20% | 30% |
| Tempête majeure/sévère | 10% | 20% | 25% |
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