Viewing archive of söndag, 31 oktober 2004

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 2004 Oct 31 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 305 publicerat klockan 2200Z på 31 Oct 2004

IA. Analys av solfläcksgrupper och solaktivitet från 30-2100Z till 31-2100Z

Solar activity was moderate for the past 24 hours. Region 691 (N14W40) produced two M-class flares: an M1 at 0226 UT and an M2/Sf at 0532 UT. The M2 was accompanied by type II and type IV radio sweeps. Newly received LASCO data for 30 October indicated a nearly full halo CME after yesterday's M5 x-ray event: the CME is first visible in C2 at 30/1654 UTC and has plane-of sky velocity of about 700-800 km/s. The CME is not symmetric and most of the material appears to be moving away from the southwest limb. Region 691 has become somewhat quieter in the last 24 hours. The leader spots show slight decline, but the trailer spots have been growing. Region 693 (S16E20) showed growth during the past 24 hours, with the emergence of spots in the middle portion of the group, but the region only managed to produce one C-class flare.
IB. Prognos för solaktivitet
Solar activity is expected to be moderate, with a slight chance for major flare activity. Region 691 is the main threat for moderate or higher activity levels, although Region 693 might also contribute. There is also a slight chance for a proton event from Region 691, given its favorable location on the disk.
IIA. Sammanfattning av geofysisk aktivitet 30-2100Z till 31-2100Z
The geomagnetic field was quiet to unsettled during the past 24 hours. The > 10 MeV proton enhancement that began yesterday reached a maximum of 2.5 PFU at 30/2150 UTC and has been steadily declining since then.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is expected to continue at quiet to unsettled levels until sometime around mid-day tomorrow (01 November) when transient flow from the energetic solar events of 30 October are expected to arrive at Earth. Active conditions with some periods of minor storm levels are expected to follow and persist for 24-36 hours. Conditions are expected to subside to unsettled to active levels on the third day (03 November).
III. Chans för solutbrott från 01 Nov till 03 Nov
M-klass60%60%60%
X-klass15%15%15%
Proton20%20%20%
PCAFyellow
IV. Penticton 10.7 cm Flux
  Observerad       31 Oct 139
  Prognoserat   01 Nov-03 Nov  140/140/135
  90 Day Mean        31 Oct 107
V. Geomagnetiskt A-index
  Observerad Afr/Ap 30 Oct  010/017
  Förväntat     Afr/Ap 31 Oct  008/010
  Prognoserat    Afr/Ap 01 Nov-03 Nov  020/025-020/030-015/020
VI. Chanser för geomagnetisk aktivitet från 01 Nov till 03 Nov
A. Medelhöga breddgrader
Aktivt30%30%25%
Små stormförhållanden25%25%20%
Svåra stormförhållanden15%15%10%
B. Höga breddgrader
Aktivt35%35%30%
Små stormförhållanden30%30%25%
Svåra stormförhållanden20%20%10%

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