Affichage des archives de mercredi, 15 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 15 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 258 publié à 2200Z le 15 SEP 1999IA. Analyse des régions solaires actives et activité du 14-2100Z au 15-2100Z SOLAR ACTIVITY WAS LOW. A LONG DURATION OPTICALLY
UNCORRELATED C2.9 X-RAY EVENT WAS THE LARGEST EVENT OF THE PERIOD.
INFREQUENT MINOR C-CLASS X-RAY EVENTS WERE OBSERVED, MOSTLY WITHOUT
OPTICAL CORRELATION. REGION 8700 (N14E45) APPEARS AS THE MOST ACTIVE
REGION ON THE VISIBLE DISK, UNDERGOING SEVERAL BRIGHTNESS
FLUCTUATIONS AND SUBFLARES. REGION 8690 (N15W48) CONTINUES TO SLOWLY
GROW AND APPEARS TO HAVE BECOME MORE MAGNETICALLY COMPLEX. REMAINING
REGIONS WERE STABLE OR IN DECAY.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO CONTINUE
AT LOW LEVELS. REGIONS 8690 AND 8700 WILL LIKELY PRODUCE C-CLASS
EVENTS WITH A SMALL CHANCE FOR AN ISOLATED M-CLASS FLARE.
IIA. Résumé de l'activité géophysique du 14-2100Z au 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE PRIOR TO A SHOCK ARRIVAL AT
15/0700Z. A SHORT PERIOD OF SUSTAINED SOUTHWARD BZ WITH A 700 KM/S
WINDSPEED FOLLOWED THE SHOCK ARRIVAL AND RESULTED IN MINOR STORM
CONDITIONS AT MID LATITUDES WITH SEVERE STORMING AT HIGH LATITUDES.
QUIET TO ACTIVE CONDITIONS RETURNED TO ALL LATITUDES AFTER
15/1200UT. A SUDDEN IMPULSE OF 8NT WAS OBSERVED AT 15/2019UT.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE AT QUIET TO ACTIVE LEVELS DURING DAYTIME HOURS AND
ACTIVE TO MINOR STORM LEVELS DURING LOCAL NIGHTTIME. THIS
DISTURBANCE WILL BEGIN TO SUBSIDE ON DAY ONE THROUGH DAY TWO. QUIET
TO UNSETTLED CONDITIONS ARE LIKELY ON DAY THREE.
III. Probabilité d'éruption solaire du 16 SEP au 18 SEP
| Classe M | 15% | 15% | 15% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 15 SEP 155 Prévisionnel 16 SEP-18 SEP 160/165/170 Moyenne des 90 derniers jours 15 SEP 164
V. Indice géomagnetique A
OBSERVED AFR/AP 14 SEP 022/023 ESTIMATED AFR/AP 15 SEP 026/030 PREDICTED AFR/AP 16 SEP-18 SEP 022/020-012/015-008/012
VI. Probabilités d'activité géomagnétique du 16 SEP au 18 SEP
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 50% | 35% | 25% |
| Tempête mineure | 30% | 15% | 10% |
| Tempête majeure/sévère | 05% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 60% | 40% | 30% |
| Tempête mineure | 30% | 20% | 10% |
| Tempête majeure/sévère | 10% | 05% | 05% |
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