Affichage des archives de mercredi, 30 septembre 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 Sep 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 273 publié à 2200Z le 30 SEP 1998IA. Analyse des régions solaires actives et activité du 29-2100Z au 30-2100Z SOLAR ACTIVITY BECAME MODERATE. REGION 8340 (N19W92)
PRODUCED A LONG DURATION M2/2N FLARE AT 30/1350Z. THIS EVENT WAS
ACCOMPANIED BY STRONG TYPE II/IV SWEPT FREQUENCY EVENTS AND A 490
SFU BURST AT 2695 MHZ. MUCH MATERIAL MOTION WAS VISIBLE ALONG AND
ABOVE THE NORTHWEST LIMB IN THE FORM OF BRIGHT SURGES, ERUPTIVE
PROMINENCES, AND LOOP PROMINENCE SYSTEMS. OTHER REGIONS ON THE DISK
WERE STABLE OR SLOWLY DECAYING.
IB. Prévisions d'activité solaire
SOLAR ACTIVITY SHOULD BECOME VERY LOW
TO LOW AS THE REGIONS AT OR OVER THE NORTHWEST LIMB BECOME LESS
VISIBLE DUE TO SOLAR ROTATION. THERE IS A SLIGHT POSSIBILITY REGION
8340 MAY PRODUCE ANOTHER M-CLASS EVENT FROM BEHIND THE WEST LIMB
BETWEEN NOW AND 02 OCT.
IIA. Résumé de l'activité géophysique du 29-2100Z au 30-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO SLIGHTLY UNSETTLED. THE GREATER
THAN 100 MEV PROTON FLUX CROSSED THE 1 PFU THRESHOLD AT 30/1435Z AND
REACHED A MAXIMUM OF 3 PFU DURING THE PERIOD. THE GREATER THAN 10
MEV FLUX REACHED EVENT THRESHOLD OF 10 PFU AT 30/1520Z. DURING THE
PERIOD, A MAXIMUM FLUX OF 840 PFU WAS OBSERVED. A POLAR CAP
ABSORPTION EVENT ACCOMPANIED THE PROTON EVENT. A MAXIMUM ABSORPTION
OF 4.3 DB WAS OBSERVED AT THE END OF THE PERIOD. ENERGETIC ELECTRON
FLUXES AT GEOSYNCHRONOUS ORBIT WERE AT MODERATE TO HIGH LEVELS.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
FORECAST TO BE QUIET TO UNSETTLED FOR 01-02 OCT. UNSETTLED TO
SLIGHTLY ACTIVE CONDITIONS ARE POSSIBLE ON 03 OCT. THE GREATER THAN
10 MEV PROTON EVENT IS EXPECTED TO SLOWLY DECAY OVER THE NEXT THREE
DAYS.
III. Probabilité d'éruption solaire du 01 OCT au 03 OCT
| Classe M | 20% | 20% | 05% |
| Classe X | 05% | 05% | 01% |
| Proton | 10% | 10% | 01% |
| PCAF | IN PROGRESS | ||
IV. Flux Penticton 10.7 cm
Observé 30 SEP 122 Prévisionnel 01 OCT-03 OCT 110/107/105 Moyenne des 90 derniers jours 30 SEP 130
V. Indice géomagnetique A
OBSERVED AFR/AP 29 SEP 006/010 ESTIMATED AFR/AP 30 SEP 004/010 PREDICTED AFR/AP 01 OCT-03 OCT 008/012-008/010-010/020
VI. Probabilités d'activité géomagnétique du 01 OCT au 03 OCT
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 10% | 10% | 10% |
| Tempête mineure | 05% | 05% | 05% |
| Tempête majeure/sévère | 01% | 01% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 20% | 20% | 25% |
| Tempête mineure | 10% | 10% | 15% |
| Tempête majeure/sévère | 05% | 05% | 05% |
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