Affichage des archives de samedi, 24 novembre 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 Nov 24 2300 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 329 publié à 2200Z le 24 Nov 2012IA. Analyse des régions solaires actives et activité du 23-2100Z au 24-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3/1n event observed at
24/1340Z from Region 1618 (N08W41) accompanied by a Type II radio sweep
(685 km/s). No coronagraph imagery was available for analysis at the
time of this report. Region 1618 showed signs of decay during the
period, but retained weak beta-gamma-delta characteristics. New Region
1621 (N15E76) was numbered today and is currently a simple Hsx type with
alpha magnetic characteristics. The remaining 3 regions were stable.
Other than the potential CME associated with the Type II sweep noted
above, no earth-directed CMEs were detected.
IB. Prévisions d'activité solaire
Solar activity is expected to be at low
levels on days one, two, and three (25 Nov, 26 Nov, 27 Nov) with a
diminishing chance for an isolated M-flare from Region 1618 as it
continues to decay.
IIA. Résumé de l'activité géophysique du 23-2100Z au 24-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. The
maximum solar wind speed at the ACE spacecraft was 439 km/s at 24/1137Z.
Total IMF reached 17.1 nT at 23/2216Z. The maximum southward component
of Bz reached -10.3 nT at 24/0621Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 789 pfu.
IIB. Prévision de l'activité géophysique
The geomagnetic field is expected
to range from quiet to minor storm levels over the next three days (25
Nov, 26 Nov, 27 Nov). The 21 November CME is expected to become
geoeffective late on 24 or early on 25 November. Unsettled to active
periods with an isolated minor storm period are expected on day 1 (25
November). Conditions are expected to return to quiet to unsettled
levels on day 2 (26 November). The 23 November CME is expected to
arrive on day 3 (27 November), bringing unsettled to active conditions
with a slight chance for an isolated minor storm period, particularly at
high latitudes.
III. Probabilité d'éruption solaire du 25 Nov au 27 Nov
| Classe M | 30% | 30% | 30% |
| Classe X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 24 Nov 118 Prévisionnel 25 Nov-27 Nov 120/115/110 Moyenne des 90 derniers jours 24 Nov 123
V. Indice géomagnetique A
Observé Afr/Ap 23 Nov 006/006 Estimé Afr/Ap 24 Nov 013/015 Prévisionnel Afr/Ap 25 Nov-27 Nov 015/018-008/005-013/015
VI. Probabilités d'activité géomagnétique du 25 Nov au 27 Nov
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 10% | 25% |
| Tempête mineure | 15% | 05% | 10% |
| Tempête majeure/sévère | 05% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 15% |
| Tempête mineure | 30% | 15% | 25% |
| Tempête majeure/sévère | 50% | 15% | 35% |
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