Affichage des archives de jeudi, 9 février 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 Feb 09 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 040 publié à 2200Z le 09 Feb 2012IA. Analyse des régions solaires actives et activité du 08-2100Z au 09-2100Z Solar activity was at low levels due to C-class flaring
from Region 1415 (N10W73), the largest a C2/Sf at 08/2217Z. The
region showed little change as it approached the west limb. New
Region 1416 (S16E24) emerged on the disk as a D-type spot group and
produced two B9 x-ray events. No Earth-directed CMEs were observed
during the period.
IB. Prévisions d'activité solaire
Solar activity is expected to remain
at low levels for the next three days (10 - 12 February). A slight
chance for M-class activity exists on days two and three due to the
anticipated return of old Region 1402 (N26, L=213).
IIA. Résumé de l'activité géophysique du 08-2100Z au 09-2100Z
The geomagnetic field was at quiet to unsettled levels with isolated
active periods observed at high latitudes. ACE satellite wind
velocities began the period at about 450 km/s and gradually
decreased to near 360 km/s through 09/1230Z. During this same time
frame, the Bz component of the interplanetary magnetic field did not
vary much beyond +/- 4 nT. By 09/1230Z, an increase in temperature,
density, velocity and Bt were recorded at ACE. These signatures
were indicative of a co-rotating interaction region in advance of a
coronal high speed stream (CH HSS). 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 unsettled levels with isolated high
latitude active periods on day one (10 February). This activity is
due to effects from a geoeffective CH HSS. By day two (11
February), quiet to unsettled conditions are expected as the CH HSS
rotates out of a geoeffective position. Day three (12 February) is
expected to see a return to quiet to unsettled levels with isolated
high latitude active intervals due to another CH HSS that will move
into a geoeffective position.
III. Probabilité d'éruption solaire du 10 Feb au 12 Feb
| Classe M | 05% | 10% | 10% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 09 Feb 099 Prévisionnel 10 Feb-12 Feb 105/115/120 Moyenne des 90 derniers jours 09 Feb 136
V. Indice géomagnetique A
Observé Afr/Ap 08 Feb 009/010 Estimé Afr/Ap 09 Feb 007/008 Prévisionnel Afr/Ap 10 Feb-12 Feb 006/008-004/005-006/008
VI. Probabilités d'activité géomagnétique du 10 Feb au 12 Feb
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 05% | 30% |
| Tempête mineure | 10% | 01% | 10% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 40% | 10% | 40% |
| Tempête mineure | 20% | 05% | 20% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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