Affichage des archives de mardi, 26 janvier 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 Jan 26 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 026 publié à 2200Z le 26 JAN 1999IA. Analyse des régions solaires actives et activité du 25-2100Z au 26-2100Z SOLAR ACTIVITY RETURNED TO A LOW LEVEL. THE LARGEST
EVENT WAS AN IMPULSIVE C7/1N FROM REGION 8447 (N19W72) AT 26/1844Z
THAT WAS ACCOMPANIED BY MINOR RADIO BURSTS. REGION 8447 IS A SMALL
SPOT GROUP VERY NEAR PREVIOUSLY ACTIVE REGION 8444 (N19W66). REGION
8444 EXHIBITED DECAY DURING THE PERIOD. RECENT MAGNETIC DATA SHOW
SOME MIXED MAGNETIC FIELDS IN THIS SMALL COMPLEX OF REGIONS. A
MODERATE DURATION C5 X-RAY EVENT OCCURRED AT 26/1121Z. AN OBSERVER
REPORTED FAINT CORONAL RAIN BEHIND THE WEST LIMB AT SW25 NEAR THE
END OF THIS X-RAY FLARE. IT IS LIKELY THIS EVENT ORIGINATED FROM
REGION 8439 WHICH IS ONE DAY BEYOND THE WEST LIMB AT THAT LATITUDE.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY SHOULD REMAIN AT
PREDOMINANTLY LOW LEVELS FOR THE NEXT TWO DAYS WITH REGIONS 8444 AND
8447 PRODUCING OCCASIONAL C-CLASS EVENTS AND POSSIBLY AN ISOLATED
M-CLASS FLARE. VERY LOW LEVELS ARE EXPECTED TO BEGIN ON 29 JAN WHEN
THESE REGIONS ROTATE OFF THE DISK. A FILAMENT LOCATED NEAR N31 AT
THE CENTRAL MERIDIAN COULD ERUPT DURING ITS DISK TRANSIT. A LONG
DURATION C OR M-CLASS EVENT WITH A LARGE CORONAL MASS EJECTION COULD
RESULT SHOULD THE ERUPTION OCCUR.
IIA. Résumé de l'activité géophysique du 25-2100Z au 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. SOLAR WIND VELOCITIES CONTINUED TO
DECREASE. THE GT 10 MEV PROTON ENHANCEMENT CONTINUED TO DECLINE AND
WAS VERY NEAR BACKGROUND LEVEL AT THE END OF THE PERIOD.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO SLIGHTLY UNSETTLED FOR THE NEXT THREE DAYS.
III. Probabilité d'éruption solaire du 27 JAN au 29 JAN
| Classe M | 20% | 20% | 05% |
| Classe X | 10% | 05% | 01% |
| Proton | 10% | 05% | 01% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 26 JAN 133 Prévisionnel 27 JAN-29 JAN 123/118/112 Moyenne des 90 derniers jours 26 JAN 144
V. Indice géomagnetique A
OBSERVED AFR/AP 25 JAN 006/009 ESTIMATED AFR/AP 26 JAN 005/010 PREDICTED AFR/AP 27 JAN-29 JAN 010/010-010/008-010/007
VI. Probabilités d'activité géomagnétique du 27 JAN au 29 JAN
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 10% | 10% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 15% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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