Affichage des archives de vendredi, 28 janvier 2000
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 2000 Jan 28 2200 UTCFait par le NOAA © SWPC et adapté par SpaceWeatherLive.com
Rapport de l'USAF/NOAA sur l'activité solaire et géophysique
SDF numéro 028 publié à 2200Z le 28 JAN 2000IA. Analyse des régions solaires actives et activité du 27-2100Z au 28-2100Z SOLAR ACTIVITY WAS LOW. THERE WERE TWO C-CLASS FLARES
DURING THE PAST 24 HOURS. THE LARGEST OF THESE WAS A C4/SF AT 2009UT
FROM REGION 8841 (S30W22). THIS REGION HAS SHOWN A SLOW GROWTH TREND
BUT IS STILL MAGNETICALLY SIMPLE. REGION 8848 (S09E54) PRODUCED THE
OTHER C-FLARE; A C1/SF AT 0659Z. THE GROUP IS SMALL BUT EXHIBITED
RELATIVELY BRIGHT, OCCASIONALLY FLUCTUATING PLAGE. NEW REGION 8849
EMERGED NEAR S16E19 AS A SMALL, B-TYPE SUNSPOT GROUP. (NOTE: TODAY'S
10.7 CM FLUX READING WAS TAKEN FROM THE PENTICTON OBSERVATORY
MORNING READING BECAUSE THE NOON TIME VALUE OF 152 WAS FLARE
ENHANCED)
IB. Prévisions d'activité solaire
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
THERE IS A SLIGHT CHANCE, HOWEVER, FOR AN ISOLATED M-CLASS EVENT
OVER THE NEXT THREE DAYS.
IIA. Résumé de l'activité géophysique du 27-2100Z au 28-2100Z
THE GEOMAGNETIC FIELD RANGED FROM UNSETTLED TO MAJOR STORM LEVELS.
MOSTLY ACTIVE LEVELS HAVE DOMINATED THE MAJORITY OF THE PAST 24
HOURS, BUT A PERIOD OF MINOR TO MAJOR STORM LEVELS OCCURRED BETWEEN
0000-0300 UT AND A PERIOD OF MINOR STORM LEVELS OCCURRED BETWEEN
1200-1500 UT. TODAY'S SOLAR WIND OBSERVATIONS INDICATED THE ONSET OF
HIGH SPEED, LOW DENSITY CORONAL HOLE CONDITIONS AROUND 28/0000UT:
SPEEDS LEVELED TO 700-800 KM/S AND THE DENSITY FELL STEADILY DURING
THE UT DAY WITH INITIAL VALUES OF 10 P/CC DECLINING TO 1-2 P/CC BY
THE END OF THE REPORTING PERIOD.
IIB. Prévision de l'activité géophysique
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY ACTIVE FOR THE NEXT 24 HOURS, AND IS EXPECTED
TO BE UNSETTLED TO ACTIVE FOR THE SECOND AND THIRD DAYS. THE
ENHANCED LEVEL OF ACTIVITY IS EXPECTED DUE TO CONTINUING CORONAL
HOLE EFFECTS.
III. Probabilité d'éruption solaire du 29 JAN au 31 JAN
| Classe M | 15% | 15% | 15% |
| Classe X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Flux Penticton 10.7 cm
Observé 28 JAN 126 Prévisionnel 29 JAN-31 JAN 125/125/125 Moyenne des 90 derniers jours 28 JAN 174
V. Indice géomagnetique A
OBSERVED AFR/AP 27 JAN 010/012 ESTIMATED AFR/AP 28 JAN 025/025 PREDICTED AFR/AP 29 JAN-31 JAN 020/020-015/025-015/020
VI. Probabilités d'activité géomagnétique du 29 JAN au 31 JAN
| A. Latitudes moyennes | |||
|---|---|---|---|
| Actif | 50% | 40% | 35% |
| Tempête mineure | 20% | 15% | 10% |
| Tempête majeure/sévère | 10% | 05% | 05% |
| B. Hautes latitudes | |||
|---|---|---|---|
| Actif | 40% | 45% | 50% |
| Tempête mineure | 25% | 15% | 10% |
| Tempête majeure/sévère | 10% | 05% | 05% |
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