Viewing archive of fredag, 27 april 2007

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 2007 Apr 27 2203 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 117 publicerat klockan 2200Z på 27 Apr 2007

IA. Analys av solfläcksgrupper och solaktivitet från 26-2100Z till 27-2100Z

Solar activity was very low during the past 24 hours. Region 953 (S10E49) produced several B-class events during the past 24 hours. As the region has rotated more fully into view, it now appears that the group consists mostly of a large penumbral area which contains opposite magnetic polarities, making the group a beta-delta magnetic classification.
IB. Prognos för solaktivitet
Solar activity is expected to be very low to low for the next three days (28-30 April), with a slight chance for an isolated M-class event from Region 953.
IIA. Sammanfattning av geofysisk aktivitet 26-2100Z till 27-2100Z
The geomagnetic field was quiet to active during the past 24 hours. An initially quiet to unsettled field became unsettled to active with the onset of a high speed solar wind stream around 1500Z. Solar wind velocity increased to about 600 km/s and the interplanetary magnetic field showed fluctuations from about -9 nT to +7 nT.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is expected to be mostly active with a chance for isolated minor storm periods for the next 24 hours (28 April) as the high speed stream is expected to continue. Unsettled levels with a chance for active periods is expected for the second day (29 April) and conditions should decline to mostly unsettled by the third day (30 April).
III. Chans för solutbrott från 28 Apr till 30 Apr
M-klass15%15%15%
X-klass01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observerad       27 Apr 083
  Prognoserat   28 Apr-30 Apr  085/085/085
  90 Day Mean        27 Apr 074
V. Geomagnetiskt A-index
  Observerad Afr/Ap 26 Apr  004/006
  Förväntat     Afr/Ap 27 Apr  008/012
  Prognoserat    Afr/Ap 28 Apr-30 Apr  020/030-015/015-010/010
VI. Chanser för geomagnetisk aktivitet från 28 Apr till 30 Apr
A. Medelhöga breddgrader
Aktivt45%30%15%
Små stormförhållanden25%15%05%
Svåra stormförhållanden10%05%01%
B. Höga breddgrader
Aktivt45%30%20%
Små stormförhållanden30%20%15%
Svåra stormförhållanden15%10%05%

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