Affichage des archives de mercredi, 20 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 20 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 020 publié à 2200Z le 20 JAN 1999IA. Analyse des régions solaires actives et activité du 19-2100Z au 20-2100Z SOLAR ACTIVITY WAS HIGH. A LONG DURATION M-5 X-RAY
EVENT OCCURRED AT 20/2003Z. THE SOURCE OF THIS EVENT IS SUSPECTED
TO BE FROM JUST BEHIND THE NORTHEAST LIMB DUE TO A CME REPORTED BY
THE MAUNA LOA SOLAR OBSERVATORY. A TYPE IV, AND A TYPE II SWEEP
WITH A SHOCK SPEED OF 800 KM/S WAS ASSOCIATED WITH THIS EVENT. AN
230 SFU TENFLARE WAS ALSO DETECTED. REGIONS 8439 (S23W29) AND 8440
(N19W25) CONTINUE TO EXHIBIT PLAGE FLUCTUATIONS AND POINT
BRIGHTENINGS. SEVERAL MINOR C-CLASS X-RAY FLARES AND OPTICAL
SUBFLARES ALSO OCCURRED DURING THE PERIOD. REGION 8442 (N24W55) HAS
DECAYED FROM 11 SPOTS WITH A BETA-GAMMA DELTA MAGNETIC
CLASSIFICATION DOWN TO 7 SPOTS AND A MORE SIMPLE BETA MAGNETIC
CLASSIFICATION. NO NEW REGIONS WERE NUMBERED.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE. REGIONS 8439 AND 8440 ARE CAPABLE OF PRODUCING ISOLATED
M-CLASS EVENTS. ANOTHER ISOLATED EVENT COULD OCCUR FROM THE REGION
JUST BEHIND THE NORTH EAST LIMB.
IIA. Résumé de l'activité géophysique du 19-2100Z au 20-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED. THERE IS A CHANCE OF A PROTON EVENT AT
GREATER THAN 10MEV AS A RESULT OF TODAY'S M5 X-RAY EVENT. IF THE
EVENT DOES OCCUR, PROTONS ARE EXPECTED AT GEOSYNCHRONOUS ORBIT IN
ABOUT 24 TO 36 HOURS
III. Probabilité d'éruption solaire du 21 JAN au 23 JAN
| Classe M | 60% | 50% | 50% |
| Classe X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 20 JAN 172 Prévisionnel 21 JAN-23 JAN 178/185/185 Moyenne des 90 derniers jours 20 JAN 141
V. Indice géomagnetique A
OBSERVED AFR/AP 19 JAN 003/005 ESTIMATED AFR/AP 20 JAN 008/008 PREDICTED AFR/AP 21 JAN-23 JAN 012/012-012/014-012/014
VI. Probabilités d'activité géomagnétique du 21 JAN au 23 JAN
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 25% | 25% | 25% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 01% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 35% | 35% | 30% |
| Tempête mineure | 15% | 15% | 10% |
| Tempête majeure/sévère | 01% | 01% | 01% |
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