Affichage des archives de mardi, 4 mai 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 May 04 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 124 publié à 2200Z le 04 MAY 1999IA. Analyse des régions solaires actives et activité du 03-2100Z au 04-2100Z SOLAR ACTIVITY WAS MODERATE. THIS WAS DUE TO A SINGLE
M1 EVENT THAT OCCURRED AT 03/2311UT. THIS WAS AN OPTICALLY
UNCORRELATED EVENT. THE MOST ACTIVE REGION WAS 8527 (N26E12),
PRODUCING A C2/1F EVENT AT 04/1858. THIS WAS SOMEWHAT UNUSUAL
ACTIVITY FROM A SINGLE SPOT HSX CLASSIFICATION. THE REST OF THE
REGIONS SHOWED LITTLE CHANGE AND ONLY MINOR ACTIVITY DURING THE DAY.
A NEW REGION WAS NUMBERED: 8531 (N18E65), A 2 SPOT CSO BETA GROUP.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. ISOLATED M-CLASS EVENTS CAN BE EXPECTED IN THE NEXT 72
HOURS.
IIA. Résumé de l'activité géophysique du 03-2100Z au 04-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET WITH A SINGLE UNSETTLED PERIOD
OCCURRING AT 04/06-09UT. THE GREATER THAN 2 MEV ELECTRONS AT
GEOSYNCHRONOUS ORBIT WERE AT HIGH LEVELS ALL DAY.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO INCREASE FROM QUIET TO ACTIVE CONDITIONS OVER THE NEXT
TWO DAYS. THIS INCREASE SHOULD BE CAUSED BY THE CORONAL MASS
EJECTION THAT OCCURRED ON 03/0606UT AS SEEN BY SOHO-LASCO. THE EPAM
PLOT (ELECTRON AND PROTON PARTICLES) FROM THE ACE SATELLITE HAS
SHOWN A STRONG AND STEADY INCREASE SINCE APPROXIMATELY 03/2200UT.
THIS IS USUALLY AN INDICATOR OF AN IMMINENT SHOCK ARRIVAL AT EARTH.
III. Probabilité d'éruption solaire du 05 MAY au 07 MAY
| Classe M | 40% | 40% | 40% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 04 MAY 139 Prévisionnel 05 MAY-07 MAY 125/125/125 Moyenne des 90 derniers jours 04 MAY 129
V. Indice géomagnetique A
OBSERVED AFR/AP 03 MAY 008/009 ESTIMATED AFR/AP 04 MAY 010/010 PREDICTED AFR/AP 05 MAY-07 MAY 020/020-020/020-015/015
VI. Probabilités d'activité géomagnétique du 05 MAY au 07 MAY
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 40% | 40% | 30% |
| Tempête mineure | 25% | 25% | 20% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 60% | 60% | 40% |
| Tempête mineure | 20% | 20% | 15% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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