Guarda l'archivio di domenica, 2 novembre 2003

Rapporto attività solare

Rapporto dell'attività geofisica solare 2003 Nov 02 2200 UTC
Preparato dal NOAA © SWPC ed elaborato da SpaceWeatherLive.com

Relazione congiunta USAF/NOAA sull'attività solare e geofisica

Numero SDF 306 rilasciato alle 2200Z il 02 Nov 2003

IA. Analisi delle regioni solari attive e delle attività dal 01-2100Z al 02-2100Z

Solar activity increased to high levels today. Region 486 (S17W62) continues to exhibit its very impressive characteristics by producing another in a series of major events as it unleashed an X8/2b flare at 02/1725Z. A Tenflare, Type II (with an estimated shock velocity of 1691 km/s) and IV radio sweeps, along with strong radio bursts at all frequencies were associated in this event. Initial SOHO/LASCO imagery indicates another in the sequence of Earth bound full halo CME's that this region has produced. An M3 x-ray flare also occurred in this region during the period which produced an associated Type II radio sweep with a estimated shock velocity of 1079 km/s and a west limb CME. Consensus indicates that this region underwent a resurgence in penumbral coverage with 2160 millionths of areal coverage. Several complex beta-gamma-delta magnetic structures remain evident in this group. Region 488 (N08W68) produced minor C-class flare activity today and has undergone little change during the period. No new regions were numbered today.
IB. Previsione dell'Attività Solare
Solar activity is expected to be at moderate to high levels.
IIA. Sommario dell'Attività Geofisica dal 01-2100Z al 02-2100Z
The geomagnetic field was at unsettled to minor storm levels. Isolated minor storm conditions were likely due to the continued elevated solar winds speeds and the occasional southward Bz in the interplanetary magnetic field. The greater than 10 MeV proton fluxes reached alert levels at 02/1105Z and was initially believed to have been from the M3 event earlier in the period (early maximum was 30 pfu). Since the X8 event they have seen a maximum of 797 at 02/2130Z. The greater than 100 MeV proton fluxes have also reached alert levels due to the X8 event; at 1740 (15 minutes from flare maximum) they pushed through event threshold and have since seen a maximum of 49 pfu. A polar cap absorption event is in progress.
IIB. Previsione dell'Attività Geofisica
The geomagnetic field is expected to be at unsettled to severe storm levels beginning on day one near the middle of the day and continuing through day two due to the full halo CME that resulted from the X8 flare today. Day three may see a return to unsettled to active levels.
III. Probabilità di evento 03 Nov to 05 Nov
Classe M90%90%70%
Classe X75%75%50%
Protone99%75%50%
PCAFin progress
IV. Penticton 10.7 cm Flux
  Osservato       02 Nov 190
  Previsto   03 Nov-05 Nov  180/170/150
  Media di 90 giorni        02 Nov 131
V. Indici Geomagnetici A
  Osservato Afr/Ap 01 Nov  016/021
  Stimato     Afr/Ap 02 Nov  015/017
  Previsto    Afr/Ap 03 Nov-05 Nov  080/120-130/160-020/030
VI. Probabilità di Attività Geomagnetica dal 03 Nov al 05 Nov
A. Medie Latitudini
Attivo30%20%40%
Tempesta minore30%25%20%
Tempesta maggiore intensa30%55%15%
B. Alte Latitudini
Attivo20%10%50%
Tempesta minore40%20%30%
Tempesta maggiore intensa40%70%20%

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