Affichage des archives de mercredi, 30 décembre 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 Dec 30 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 364 publié à 2200Z le 30 DEC 1998IA. Analyse des régions solaires actives et activité du 29-2100Z au 30-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8421 (N26W14)
PRODUCED ALL OF TODAY'S FLARES, INCLUDING THE ONLY M-CLASS EVENT: AN
M1/SF AT 0546Z. THE GROUP SHOWED SLOW GROWTH TODAY, PRIMARILY BY
MEANS OF CONSOLIDATION OF THE LEADER PART OF THE GROUP INTO A
SINGLE, LARGE PENUMBRAL REGION. THE REGION PRODUCED FREQUENT
SUBFLARES THROUGHOUT THE DAY, 7 OF WHICH WERE LOW-LEVEL C-CLASS
EVENTS. IT WOULD APPEAR THAT THE STORAGE OF NON-POTENTIAL MAGNETIC
ENERGY IN THE REGION IS PROMPTLY DISSIPATED BY THESE FREQUENT SMALL
EVENTS. REGION 8419 (N26W65) DECREASED SLOWLY TODAY AND WAS VERY
STABLE. NEW REGION 8425 (S26E50) WAS ASSIGNED TODAY AND IS A SIMPLE,
SMALL, BIPOLAR SUNSPOT GROUP.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE. REGION 8421 IS EXPECTED TO BE THE SOURCE FOR ANY M-CLASS
ACTIVITY OVER THE NEXT THREE DAYS. THERE CONTINUES TO BE A CHANCE
FOR AN ISOLATED MAJOR FLARE EVENT FROM THIS REGION.
IIA. Résumé de l'activité géophysique du 29-2100Z au 30-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED. THE FIRST THREE
HOURS OF THE REPORTING PERIOD BEGAN WITH MOSTLY UNSETTLED CONDITIONS
WITH A FEW HIGH LATITUDE STATIONS REPORTING ACTIVE CONDITIONS.
CONDITIONS CALMED SLIGHTLY BETWEEN 0000-0700Z WITH ACTIVITY ON THE
BORDERLINE BETWEEN QUIET AND UNSETTLED. SINCE 0700Z, HOWEVER, THE
FIELD HAS BEEN VERY QUIET AT ALL LATITUDES. AN EXAMINATION OF THE
INTERPLANETARY MAGNETIC FIELD COMPONENT BZ SHOWED A NORTHWARD
TURNING OF THE FIELD TO ABOUT +5 NT AT 0500Z.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TOMORROW IN RESPONSE TO EFFECTS FROM A
FAVORABLY POSITIONED CORONAL HOLE. UNSETTLED CONDITIONS MAY LINGER
INTO THE EARLY PART OF THE SECOND DAY, BUT QUIET CONDITIONS SHOULD
PREVAIL FOR MOST OF THE SECOND AND THIRD DAYS.
III. Probabilité d'éruption solaire du 31 DEC au 02 JAN
| Classe M | 65% | 65% | 65% |
| Classe X | 15% | 15% | 15% |
| Proton | 15% | 20% | 20% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 30 DEC 179 Prévisionnel 31 DEC-02 JAN 172/165/160 Moyenne des 90 derniers jours 30 DEC 136
V. Indice géomagnetique A
OBSERVED AFR/AP 29 DEC 010/016 ESTIMATED AFR/AP 30 DEC 004/010 PREDICTED AFR/AP 31 DEC-02 JAN 010/010-007/010-005/007
VI. Probabilités d'activité géomagnétique du 31 DEC au 02 JAN
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 15% | 15% | 10% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 15% | 15% | 10% |
| Tempête mineure | 10% | 10% | 05% |
| Tempête majeure/sévère | 05% | 05% | 01% |
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