Affichage des archives de mardi, 19 octobre 1999
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 1999 Oct 19 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 292 publié à 2200Z le 19 OCT 1999IA. Analyse des régions solaires actives et activité du 18-2100Z au 19-2100Z SOLAR ACTIVITY WAS LOW. THE LARGEST EVENT OF THE PERIOD
WAS A C8/SF FROM REGION 8732 (N22W52) AT 19/1941Z. THIS REGION
PRODUCED SEVERAL MINOR C-CLASS SUBFLARES THROUGHOUT THE PERIOD.
REGION 8731 (N13W45) HAS DECAYED SLIGHTLY , PRODUCING OCCASIONAL
MINOR SUBFLARES. AN EXTENDED PERIOD OF BRIGHT SURGING WAS OBSERVED
ON THE SE LIMB BETWEEN 19/0700 - 1000Z, A CME FROM THE SAME LOCATION
OCCURRED DURING THAT TIME FRAME. NEW REGION 8737 (S15E14) WAS
NUMBERED TODAY AND PRODUCED A SUBFLARE LATE IN THE PERIOD.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. THOUGH LARGE AND MAGNETICALLY COMPLEX REGION 8731 HAS
SHOWN SIGNS OF DECAY, IT MAINTAINS POTENTIAL FOR AN ISOLATED M-CLASS
EVENT. REGION 8732 IS EXPECTED TO CONTINUE PRODUCING C-CLASS
ACTIVITY. REGION 8737, IF IT MAINTAINS ITS PRESENT GROWTH RATE, WILL
SOON BECOME A GOOD CANDIDATE FOR C-CLASS ACTIVITY.
IIA. Résumé de l'activité géophysique du 18-2100Z au 19-2100Z
THE GEOMAGNETIC FIELD WAS AT QUIET TO UNSETTLED LEVELS WITH
OCCASIONAL ACTIVE PERIODS OBSERVED DURING LOCAL NIGHTTIME HOURS AT
HIGH LATITUDES. THE GREATER THAN TWO MEV ELECTRON FLUX REMAINED AT
MODERATE TO HIGH LEVELS.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED LEVELS. OCCASIONAL ACTIVE
CONDITIONS ARE POSSIBLE ON DAYS TWO AND THREE AS A CORONAL HOLE
MOVES INTO A GEOEFFECTIVELY FAVORABLE POSITION.
III. Probabilité d'éruption solaire du 20 OCT au 22 OCT
| Classe M | 45% | 45% | 40% |
| Classe X | 10% | 10% | 05% |
| Proton | 10% | 10% | 05% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 19 OCT 170 Prévisionnel 20 OCT-22 OCT 170/165/160 Moyenne des 90 derniers jours 19 OCT 159
V. Indice géomagnetique A
OBSERVED AFR/AP 18 OCT 006/006 ESTIMATED AFR/AP 19 OCT 007/010 PREDICTED AFR/AP 20 OCT-22 OCT 010/008-012/015-012/012
VI. Probabilités d'activité géomagnétique du 20 OCT au 22 OCT
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 20% | 25% | 25% |
| Tempête mineure | 05% | 10% | 10% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 20% | 30% | 30% |
| Tempête mineure | 10% | 15% | 15% |
| Tempête majeure/sévère | 01% | 05% | 05% |
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