Viewing archive of fredag, 28 januari 2000

Solaktivitetsrapport

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 för sol- och geofysisk aktivitet 2000 Jan 28 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 028 publicerat klockan 2200Z på 28 JAN 2000

IA. Analys av solfläcksgrupper och solaktivitet från 27-2100Z till 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. Prognos för solaktivitet
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. Sammanfattning av geofysisk aktivitet 27-2100Z till 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. Prognos för geofysisk aktivitet
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. Chans för solutbrott från 29 JAN till 31 JAN
M-klass15%15%15%
X-klass01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       28 JAN 126
  Prognoserat   29 JAN-31 JAN  125/125/125
  90 Day Mean        28 JAN 174
V. Geomagnetiskt A-index
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. Chanser för geomagnetisk aktivitet från 29 JAN till 31 JAN
A. Medelhöga breddgrader
Aktivt50%40%35%
Små stormförhållanden20%15%10%
Svåra stormförhållanden10%05%05%
B. Höga breddgrader
Aktivt40%45%50%
Små stormförhållanden25%15%10%
Svåra stormförhållanden10%05%05%

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