Affichage des archives de samedi, 22 janvier 2005
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 2005 Jan 22 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 022 publié à 2200Z le 22 Jan 2005IA. Analyse des régions solaires actives et activité du 21-2100Z au 22-2100Z Solar activity was low during the past 24 hours. There
were three C-class flares: a C3 at 0432 UTC from the west limb at
S07, a C1 at 1245 UTC from the west limb at N14, and a C1 at 2053
UTC from the west limb at N15. The first flare was probably from old
Region 719 which recently rotated around west limb, and the other
two were probably from Region 720 which rotated off the disk today.
With the departure of Region 720, Region 725 (S04W49) is now the
largest group on the disk with an area of about 190 millionths.
Region 725 has been growing steadily but so far has produced only
minor flare activity.
IB. Prévisions d'activité solaire
Solar activity is expected to be
mostly low. There is a chance for an M-class event, and a slight
chance for a major flare event, from Region 720 during the next 24
hours (23 January). However, the likelihood for M-class or higher
level events is expected to decline strongly for the 2nd and 3rd
days (24-25 January) as the region gets further beyond the west
limb.
IIA. Résumé de l'activité géophysique du 21-2100Z au 22-2100Z
The geomagnetic field was at active to major storm levels from the
beginning of the period (21/2100 UTC) through 22/0600 UTC. Since
0600 UTC conditions have been mostly unsettled. Solar wind
signatures show a steady decline in velocity from around 950 km/s at
the beginning of the interval down to about 650 km/s by 22/2100 UTC.
Bz has been weak and density has been low since 22/0200 UTC up to
the current time. The greater than 10 MeV proton fluxes continued to
decline today and appear to have dropped below threshold of 10 PFU
after 22/1755 UTC.
IIB. Prévision de l'activité géophysique
The geomagnetic field is
expected to be mostly active tomorrow (23 January) in response
to a favorably positioned coronal hole. Mostly unsettled levels with
some active periods are expected for 24-25 January.
III. Probabilité d'éruption solaire du 23 Jan au 25 Jan
| Classe M | 40% | 25% | 10% |
| Classe X | 20% | 10% | 01% |
| Proton | 20% | 10% | 01% |
| PCAF | green | ||
IV. Flux Penticton 10.7 cm
Observé 22 Jan 102 Prévisionnel 23 Jan-25 Jan 095/090/090 Moyenne des 90 derniers jours 22 Jan 108
V. Indice géomagnetique A
Observé Afr/Ap 21 Jan 030/061 Estimé Afr/Ap 22 Jan 020/030 Prévisionnel Afr/Ap 23 Jan-25 Jan 016/020-015/015-015/015
VI. Probabilités d'activité géomagnétique du 23 Jan au 25 Jan
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 25% | 25% |
| Tempête mineure | 20% | 15% | 15% |
| Tempête majeure/sévère | 10% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 35% | 30% |
| Tempête mineure | 30% | 30% | 25% |
| Tempête majeure/sévère | 10% | 05% | 05% |
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