Viewing archive of onsdag, 30 juni 1999

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 1999 Jun 30 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 181 publicerat klockan 2200Z på 30 JUN 1999

IA. Analys av solfläcksgrupper och solaktivitet från 29-2100Z till 30-2100Z

SOLAR ACTIVITY REMAINED AT MODERATE LEVELS. REGION 8603 (S14W11) SHOWED MINOR GROWTH AND A SLIGHT MIXING OF POLARITIES. IT PRODUCED TWO IMPULSIVE M-CLASS FLARES DURING THE PERIOD. THE FIRST WAS AN M1/1B AT 30/1130Z ACCOMPANIED BY MODERATE DISCRETE RADIO EMISSION AND A FAINT HALO-CME. THE SECOND WAS AN M2/2B PARALLEL-RIBBON FLARE AT 30/1808Z ASSOCIATED WITH MINOR DISCRETE RADIO EMISSION. REGION 8611 (S26E21) CONTINUED TO GROW GRADUALLY AND PRODUCED AN M2/1N FLARE AT 30/0446Z WITH MINOR DISCRETE RADIO EMISSION. THE FINAL M-CLASS FLARE OF THE PERIOD WAS AN M1/SF AT 30/2012Z FROM REGION 8598 (N24W49) WITH MODERATE DISCRETE RADIO EMISSION. REGION 8598 DISPLAYED GRADUAL DECAY PRIOR TO THE FLARE. REGION 8602 (N18W20) SHOWED A SLIGHT INCREASES IN PENUMBRAL COVERAGE AND MAGNETIC FIELD INTENSITY. IT PRODUCED ISOLATED SUBFLARES, NONE OF WHICH WERE ASSOCIATED WITH SIGNIFICANT X-RAY EMISSION. BRIGHT SURGING WAS SEEN NEAR NE18 AROUND 30/1230Z AND MAY PORTEND THE RETURN OF OLD REGION 8569 (N19, L=189), WHICH WAS OF MODERATE SIZE AND MAGNETIC COMPLEXITY DURING ITS PREVIOUS ROTATION. NEW REGION 8613 (N18E67) WAS NUMBERED.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO REMAIN AT MODERATE LEVELS. ISOLATED, LOW-LEVEL M-CLASS FLARES ARE LIKELY. THERE IS ALSO A SLIGHT CHANCE FOR A MAJOR FLARE SOMETIME DURING THE PERIOD.
IIA. Sammanfattning av geofysisk aktivitet 29-2100Z till 30-2100Z
THE GEOMAGNETIC FIELD WAS AT MOSTLY QUIET LEVELS.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS EXPECTED TO BE AT QUIET TO UNSETTLED LEVELS. THERE IS ALSO A CHANCE FOR ACTIVE LEVELS DURING THE LAST TWO DAYS OF THE PERIOD IN RESPONSE TO THE HALO-CME MENTIONED ABOVE.
III. Chans för solutbrott från 01 JUL till 03 JUL
M-klass60%60%60%
X-klass10%10%10%
Proton10%10%10%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       30 JUN 210
  Prognoserat   01 JUL-03 JUL  215/215/215
  90 Day Mean        30 JUN 146
V. Geomagnetiskt A-index
OBSERVED AFR/AP 29 JUN  009/009
ESTIMATED AFR/AP 30 JUN  006/008
PREDICTED AFR/AP 01 JUL-03 JUL  007/012-012/012-010/010
VI. Chanser för geomagnetisk aktivitet från 01 JUL till 03 JUL
A. Medelhöga breddgrader
Aktivt10%20%20%
Små stormförhållanden05%10%10%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt15%25%25%
Små stormförhållanden10%15%15%
Svåra stormförhållanden01%01%01%

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