Viewing archive of onsdag, 24 april 2002

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 2002 Apr 24 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 114 publicerat klockan 2200Z på 24 Apr 2002

IA. Analys av solfläcksgrupper och solaktivitet från 23-2100Z till 24-2100Z

Solar activity remained at low levels with occasional C-class flares. The largest flare was a C4/1n at 24/1605 UTC from Region 9912 (N09W51). Region 9912 showed gradual decay, mostly in its trailer spots. Region 9913 (S16W44) produced occasional subflares, a few of which reached C-class. It showed minor growth as well as a minor mix of polarities. Region 9914 (N04E04) showed gradual growth, but remained simply-structured. New Region 9924 (S17W07) emerged rapidly and produced isolated subflares. It was a relatively small D- type spot group with minor polarity mixing throughout. New Region 9923 (S03W31) was also numbered.
IB. Prognos för solaktivitet
Solar activity is expected to be at low to moderate levels. Isolated low-level M-class flares are possible during the period.
IIA. Sammanfattning av geofysisk aktivitet 23-2100Z till 24-2100Z
Geomagnetic field activity was at quiet to unsettled levels. The greater than 10 MeV proton event that began at 21/0225 UTC continued. The greater than 10 MeV proton flux was around 24.0 PFU and gradually decreasing as the period ended.
IIB. Prognos för geofysisk aktivitet
Geomagnetic field activity is expected to be at quiet to unsettled levels during 25 - 26 April increasing to unsettled to active levels on 27 April due to recurrent coronal hole effects. The greater than 10 MeV proton event is expected to end early in the period.
III. Chans för solutbrott från 25 Apr till 27 Apr
M-klass40%40%40%
X-klass05%05%05%
Proton50%05%05%
PCAFin progress
IV. Penticton 10.7 cm Flux
  Observerad       24 Apr 177
  Prognoserat   25 Apr-27 Apr  180/180/185
  90 Day Mean        24 Apr 198
V. Geomagnetiskt A-index
  Observerad Afr/Ap 23 Apr  021/022
  Förväntat     Afr/Ap 24 Apr  008/010
  Prognoserat    Afr/Ap 25 Apr-27 Apr  008/010-012/012-015/015
VI. Chanser för geomagnetisk aktivitet från 25 Apr till 27 Apr
A. Medelhöga breddgrader
Aktivt20%25%35%
Små stormförhållanden10%10%15%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt20%30%40%
Små stormförhållanden10%15%20%
Svåra stormförhållanden01%01%05%

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