Affichage des archives de mercredi, 25 mars 1998
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 1998 Mar 25 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 084 publié à 2200Z le 25 MAR 1998IA. Analyse des régions solaires actives et activité du 24-2100Z au 25-2100Z SOLAR ACTIVITY REMAINED LOW. A VERY LONG DURATION C5
X-RAY EVENT WAS OBSERVED FROM 25/1231-1434Z (HALF POWER). HOWEVER,
X-RAY FLUXES FROM THIS EVENT DID NOT RETURN TO BACKGROUND UNTIL THE
END OF THE PERIOD. A LARGE FAST CORONAL MASS EJECTION WAS OBSERVED
IN THE SOUTHWEST QUADRANT WITH THIS EVENT AND RECENT X-RAY IMAGERY
SHOW THIS FLARE ORIGINATING FROM BEHIND THE SOUTHWEST LIMB. THE
SOURCE REGIONS THERE ARE 2-3 DAYS BEHIND THE LIMB. REGION 8185
(S25E25) SHOWED SLIGHT DECAY AND PRODUCED SEVERAL SUBFLARES. THIS
REGION REMAINED MAGNETICALLY COMPLEX. A SMALL FILAMENT FADED IN THIS
REGION BETWEEN 25/0112-1320Z. REGION 8183 (N22W32) CEASED ITS RAPID
GROWTH PHASE AND BEGAN TO DECAY. AN OPTICALLY UNCORRELATED WEAK TYPE
IV WAS OBSERVED AT 24/2207Z.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY SHOULD BE PREDOMINANTLY
LOW FOR THE NEXT THREE DAYS. REGION 8185 IS BECOMING LESS A THREAT
FOR M-CLASS FLARES.
IIA. Résumé de l'activité géophysique du 24-2100Z au 25-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED FROM 24/2100Z-25/0900Z.
UNSETTLED TO ACTIVE CONDITIONS WERE OBSERVED FOR THE REMAINDER OF
THE PERIOD. IT IS LIKELY THIS SMALL DISTURBANCE IS FROM AN OBLIQUE
IMPACT OF ONE OF THE MANY CORONAL MASS EJECTIONS OBSERVED DURING THE
LAST WEEK.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD SHOULD BE
UNSETTLED TO ACTIVE ON 26 MAR. ISOLATED MINOR STORM PERIODS ARE
POSSIBLE DURING THIS TIME. QUIET TO UNSETTLED CONDITIONS ARE
FORECAST FOR 27-28 MAR.
III. Probabilité d'éruption solaire du 26 MAR au 28 MAR
| Classe M | 20% | 20% | 20% |
| Classe X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 25 MAR 115 Prévisionnel 26 MAR-28 MAR 113/111/111 Moyenne des 90 derniers jours 25 MAR 099
V. Indice géomagnetique A
OBSERVED AFR/AP 24 MAR 005/007 ESTIMATED AFR/AP 25 MAR 012/012 PREDICTED AFR/AP 26 MAR-28 MAR 012/015-010/012-010/010
VI. Probabilités d'activité géomagnétique du 26 MAR au 28 MAR
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 30% | 20% | 20% |
| Tempête mineure | 15% | 10% | 10% |
| Tempête majeure/sévère | 05% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 25% | 20% |
| Tempête mineure | 20% | 15% | 10% |
| Tempête majeure/sévère | 10% | 05% | 05% |
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