Affichage des archives de samedi, 27 novembre 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 Nov 27 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 331 publié à 2200Z le 27 NOV 1999IA. Analyse des régions solaires actives et activité du 26-2100Z au 27-2100Z SOLAR ACTIVITY CONTINUED AT HIGH LEVELS. REGION 8771
(S14W78) PRODUCED AN X1/2B TENFLARE AT 27/1212Z. THIS REGION ALSO
PRODUCED TWO OTHER SIGNIFICANT EVENTS - AN M2/1N AT 27/0301Z AND AN
M1/1N AT 27/0549Z. THOUGH SOME DECAY WAS OBSERVED IN THE LAST 24
HOURS, THIS REGION RETAINS CONSIDERABLE SIZE AND MAGNETIC COMPLEXITY
AS IT APPROACHES THE WEST LIMB. REGION 8778 (S14W19) CONTINUES IN A
SLOW GROWTH PHASE AND PRODUCED A C5/1N FLARE AT 27/0452Z. A LARGE,
17 DEGREE FILAMENT ERUPTED FROM S50 NEAR CENTER DISK BETWEEN 26/1700
- 1930Z. NEW REGION 8782 (N11E01) WAS NUMBERED TODAY. NO OTHER
SIGNIFICANT ACTIVITY WAS OBSERVED.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE AT
MODERATE TO HIGH LEVELS. REGION 8771 (S14W78) SHOULD CONTINUE
PRODUCING M-CLASS ACTIVITY AS IT ROTATES AROUND THE WEST LIMB. AN
ISOLATED MAJOR FLARE IS POSSIBLE. REGION 8778 (S14W19) WILL LIKELY
CONTINUE TO PRODUCE C-CLASS ACTIVITY AND HAS POTENTIAL FOR AN
ISOLATED M-CLASS EVENT.
IIA. Résumé de l'activité géophysique du 26-2100Z au 27-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET LEVELS THROUGH DAY ONE, WITH UNSETTLED
TO ACTIVE CONDITIONS LIKELY ON DAY TWO AND THREE. THERE IS POTENTIAL
FOR A MINOR DISTURBANCE ON DAYS TWO AND THREE IN RESPONSE TO
YESTERDAY'S PARTIAL HALO CORONAL MASS EJECTION OFF THE WEST LIMB. WE
MAY ALSO HAVE TO CONTEND WITH THE EFFECTS OF A HIGH SPEED CORONAL
HOLE STREAM BY DAY THREE.
III. Probabilité d'éruption solaire du 28 NOV au 30 NOV
| Classe M | 55% | 40% | 40% |
| Classe X | 10% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | YELLOW | ||
IV. Flux Penticton 10.7 cm
Observé 27 NOV 169 Prévisionnel 28 NOV-30 NOV 160/150/145 Moyenne des 90 derniers jours 27 NOV 165
V. Indice géomagnetique A
OBSERVED AFR/AP 26 NOV 002/004 ESTIMATED AFR/AP 27 NOV 005/008 PREDICTED AFR/AP 28 NOV-30 NOV 007/010-015/015-015/015
VI. Probabilités d'activité géomagnétique du 28 NOV au 30 NOV
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 15% | 25% | 25% |
| Tempête mineure | 05% | 10% | 10% |
| Tempête majeure/sévère | 01% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 20% | 30% | 40% |
| Tempête mineure | 10% | 20% | 20% |
| Tempête majeure/sévère | 05% | 10% | 10% |
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