Affichage des archives de mercredi, 25 avril 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 Apr 25 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 116 publié à 2200Z le 25 Apr 2012IA. Analyse des régions solaires actives et activité du 24-2100Z au 25-2100Z Solar activity was at low levels. Region 1459 (S16W65)
produced a C1 x-ray event at 25/0224Z while Region 1460 (N15W81)
produced a C3/Sf at 25/1215Z. Region 1465 (S17W26) indicated
consolidation in both its leader and trailer spots. The region
appeared to have lost its gamma and delta magnetic configuration,
but still maintained an east to west oriented inversion line. No
discernible changes were noted in the remaining regions. No
Earth-directed CMEs were observed during the period.
IB. Prévisions d'activité solaire
Solar activity is expected to remain
at low levels with a slight chance for M-class activity for the next
three days (26 - 28 April).
IIA. Résumé de l'activité géophysique du 24-2100Z au 25-2100Z
The geomagnetic field ranged from quiet to minor storm conditions
with an isolated high latitude severe storm period observed during
25/0600Z - 0900Z. This activity was due to coronal hole high speed
stream affects (CH HSS). Over the past 24 hours, solar wind
velocities gradually increased from about 600 km/s to near 800 km/s.
Total field strength (Bt) varied between 5 to 12 nT while the Bz
component of the interplanetary magnetic field remained mostly south
from -4 to -10 nT. The greater than 2 MeV electron flux at
geosynchronous orbit reached high levels during the period.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be at quiet to active levels with isolated minor storm
periods on day one (26 April) as the 23 April CME is expected to
become geoeffective. Quiet to unsettled levels with isolated active
periods are expected on day two (27 April) as effects of the CME
wane. By day three (28 April), mostly quiet conditions are expected.
III. Probabilité d'éruption solaire du 26 Apr au 28 Apr
| Classe M | 20% | 20% | 20% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 25 Apr 127 Prévisionnel 26 Apr-28 Apr 125/120/120 Moyenne des 90 derniers jours 25 Apr 112
V. Indice géomagnetique A
Observé Afr/Ap 24 Apr 030/043 Estimé Afr/Ap 25 Apr 018/022 Prévisionnel Afr/Ap 26 Apr-28 Apr 017/025-011/015-004/006
VI. Probabilités d'activité géomagnétique du 26 Apr au 28 Apr
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 50% | 25% | 10% |
| Tempête mineure | 20% | 10% | 01% |
| Tempête majeure/sévère | 10% | 05% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 40% | 30% | 10% |
| Tempête mineure | 30% | 15% | 01% |
| Tempête majeure/sévère | 15% | 10% | 01% |
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La Météo Spatiale en faits
| Dernière classe X | 28/03/2024 | X1.1 |
| Dernière classe M | 19/04/2024 | M2.1 |
| Dernier orage géomagnétique | 16/04/2024 | Kp5 (G1) |
| Jours sans taches solaires | |
|---|---|
| Dernier jour sans taches solaires | 08/06/2022 |
| Nombre mensuel moyen de taches solaires | |
|---|---|
| mars 2024 | 104.9 -19.8 |