Affichage des archives de mercredi, 8 septembre 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 Sep 08 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 251 publié à 2200Z le 08 SEP 1999IA. Analyse des régions solaires actives et activité du 07-2100Z au 08-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8690 (N13E47)
PRODUCED AN M1/1B AT 1217Z. THE REGION PRODUCED ADDITIONAL
SUBFLARES, BUT IS RATHER SMALL (50 MILLIONTHS) AND IS SHOWING ONLY
SLOW GROWTH. REGION 8692 (S27E60) HAS ROTATED INTO VIEW AS AN E-TYPE
REGION AND IS CURRENTLY THE LARGEST GROUP ON THE DISK AT 230
MILLIONTHS. THE GROUP WAS QUIET AND STABLE DURING THE PAST 24 HOURS.
NEW REGION 8694 (S14W14) EMERGED ON THE DISK TODAY. AN ERUPTIVE
PROMINENCE WAS OBSERVED ON THE SOUTHWEST LIMB (S34W90) FROM
1126-1220Z.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
THERE IS A SLIGHT CHANCE, HOWEVER, FOR AN ISOLATED M-CLASS EVENT
FROM REGION 8690 OR 8692.
IIA. Résumé de l'activité géophysique du 07-2100Z au 08-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. INITIALLY ACTIVE
CONDITIONS WERE SEEN IN RESPONSE TO A HIGH-SPEED SOLAR WIND STREAM
ASSOCIATED WITH A CORONAL HOLE. CONDITIONS TURNED MARKEDLY QUIET
AFTER 0300Z IN RESPONSE TO A NORTHWARD TURNING OF THE BZ COMPONENT
OF THE INTERPLANETARY MAGNETIC FIELD. UNSETTLED CONDITIONS RETURNED
AFTER 12Z AS BZ TURNED STEADILY SOUTH FOR JUST OVER AN HOUR. QUIET
CONDITIONS PREVAILED FOR THE LAST THREE HOURS OF THE REPORTING
PERIOD.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT THREE DAYS, BUT THERE
IS A FAIR CHANCE FOR SOME ACTIVE PERIODS, ESPECIALLY AT HIGH
LATITUDES. THE ENHANCED ACTIVITY IS POSSIBLE DUE TO ADDITIONAL
CORONAL HOLES THAT WILL BE ROTATING INTO FAVORABLE POSITIONS.
III. Probabilité d'éruption solaire du 09 SEP au 11 SEP
| Classe M | 25% | 25% | 25% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 08 SEP 106 Prévisionnel 09 SEP-11 SEP 105/105/100 Moyenne des 90 derniers jours 08 SEP 166
V. Indice géomagnetique A
OBSERVED AFR/AP 07 SEP 012/017 ESTIMATED AFR/AP 08 SEP 010/010 PREDICTED AFR/AP 09 SEP-11 SEP 012/012-012/020-010/015
VI. Probabilités d'activité géomagnétique du 09 SEP au 11 SEP
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 25% | 20% | 20% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 25% | 25% |
| Tempête mineure | 10% | 10% | 10% |
| Tempête majeure/sévère | 05% | 05% | 05% |
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