Affichage des archives de mercredi, 20 février 2002
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 2002 Feb 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 051 publié à 2200Z le 20 Feb 2002IA. Analyse des régions solaires actives et activité du 19-2100Z au 20-2100Z Solar activity increased to high levels. Region 9825
(N16W81) produced an impulsive M5/1n flare at 20/0612 UT associated
with Type II and IV radio sweeps and an Earth-directed halo coronal
mass ejection (CME). Region 9825 also produced an impulsive M4 flare
at 20/0251 UT associated with Type II and IV radio sweeps and an
impulsive M4 at 20/0959 UT. This activity appeared to coincide with
the rapid emergence of opposite-polarity flux northwest of the
leader spots, but detailed analysis was hampered by its proximity to
the west limb. Region 9830 (S16W06) remained the largest and most
magnetically complex sunspot group on the disk as multiple magnetic
delta configurations persisted within its leader spots. It produced
an impulsive C9/1n flare at 20/1626 UT associated with minor
discrete radio emission. New Region 9835 (S08W61) produced an
impulsive M3/Sf flare at 20/1711 UT. New Regions 9836 (S02W26) and
9837 (N07E70) were also numbered.
IB. Prévisions d'activité solaire
Solar activity is expected to be at
moderate to high levels. M-class flares are expected. There is a
chance for isolated major flare activity from Region 9825 (which
will cross the west limb on 21 February) and Region 9830.
IIA. Résumé de l'activité géophysique du 19-2100Z au 20-2100Z
Geomagnetic field activity was at quiet to unsettled levels. A brief
greater than 10 MeV proton event at geosynchronous orbit began at
20/0730 UT, reached a maximum of 13.5 PFU at 20/0755 UT, and ended
at 20/0800 UT. This proton event was likely associated with the
M5/1n flare at 20/0612 UT from Region 9825.
IIB. Prévision de l'activité géophysique
Geomagnetic field activity is
expected to be at quiet to unsettled levels during 21- 22 February.
Field activity is expected to increase to unsettled to minor storm
levels on 23 February due to an expected CME passage associated with
today's M5/1n flare. There will be a slight chance for a proton
flare during the period.
III. Probabilité d'éruption solaire du 21 Feb au 23 Feb
| Classe M | 75% | 70% | 70% |
| Classe X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | yellow | ||
IV. Flux Penticton 10.7 cm
Observé 20 Feb 193 Prévisionnel 21 Feb-23 Feb 200/205/205 Moyenne des 90 derniers jours 20 Feb 222
V. Indice géomagnetique A
Observé Afr/Ap 19 Feb 004/004 Estimé Afr/Ap 20 Feb 010/008 Prévisionnel Afr/Ap 21 Feb-23 Feb 007/008-012/015-016/020
VI. Probabilités d'activité géomagnétique du 21 Feb au 23 Feb
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 15% | 30% | 40% |
| Tempête mineure | 05% | 10% | 15% |
| Tempête majeure/sévère | 01% | 01% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 20% | 35% | 40% |
| Tempête mineure | 10% | 15% | 20% |
| Tempête majeure/sévère | 01% | 05% | 10% |
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