Affichage des archives de dimanche, 20 mai 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 May 20 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 141 publié à 2200Z le 20 May 2012IA. Analyse des régions solaires actives et activité du 19-2100Z au 20-2100Z Solar activity was at very low levels. New Region 1487
(N19W05) emerged on the disk as a simple bi-polar group. Region 1483
(S25W43) developed additional trailer spots and is now classified as
a D-type group. All other regions were quiet and stable. No
Earth-directed CMEs were observed during the period.
IB. Prévisions d'activité solaire
Solar activity is expected to be at
predominately low levels for the next three days (21 - 23 May). A
slight chance for M-class activity exists all three days.
IIA. Résumé de l'activité géophysique du 19-2100Z au 20-2100Z
The geomagnetic field was at quiet to active levels with an isolated
minor storm interval during the 20/0300 - 0600Z period. At about
20/0136Z, the ACE satellite observed an interplanetary (IP) shock
passage with a corresponding weak sudden impulse observed at the
Boulder magnetometer (15 nT) at 20/0215Z. Prior to the IP shock,
solar wind velocities were generally in the 400 km/s range, the Bz
component of the interplanetary magnetic field (IMF) varied between
+/- 3 nT and the total field (Bt) was at 5 nT. Following the shock,
wind speeds increased to about 475 km/s, Bz varied between +/- 8 nT
and Bt increased to about 8 nT. The shock likely indicated the
arrival of the 17 May CME.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be at predominately quiet levels for day one (21 May).
By days two and three (22 - 23 May), quiet to unsettled levels with
a slight chance for isolated active periods are expected due to
coronal hole high speed stream effects coupled with the arrival of
the 18 May CME.
III. Probabilité d'éruption solaire du 21 May au 23 May
| Classe M | 15% | 15% | 15% |
| Classe X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 20 May 131 Prévisionnel 21 May-23 May 130/130/135 Moyenne des 90 derniers jours 20 May 116
V. Indice géomagnetique A
Observé Afr/Ap 19 May 005/005 Estimé Afr/Ap 20 May 010/012 Prévisionnel Afr/Ap 21 May-23 May 007/006-010/010-007/010
VI. Probabilités d'activité géomagnétique du 21 May au 23 May
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 20% | 20% |
| Tempête mineure | 01% | 10% | 10% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 10% | 25% | 25% |
| Tempête mineure | 01% | 15% | 15% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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La Météo Spatiale en faits
| Dernière classe X | 28/03/2024 | X1.1 |
| Dernière classe M | 25/04/2024 | M1.0 |
| Dernier orage géomagnétique | 19/04/2024 | Kp7 (G3) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
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|---|---|
| mars 2024 | 104.9 -19.8 |
| Last 30 days | 133.9 +26.6 |