Visa arkiv av måndag 22 oktober 2001

Solaktivitetsrapport

Rapport för sol- och geofysisk aktivitet 2001 Oct 22 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 295 publicerat klockan 2200Z på 22 Oct 2001

IA. Analys av solfläcksgrupper och solaktivitet från 21-2100Z till 22-2100Z

Solar activity was at high levels. Region 9672 (S18E13) produced an X1/2b flare at 22/1759 UTC and an associated Type II radio sweep with a shock velocity estimated at 1043 km/s. More than 20 twenty percent umbral coverage of large asymmetrical spot was observed in H-alpha. Shortly before this flare, Region 9672 had produced an M6/2n at 22/1508 UTC which had also produced a Type II and IV radio sweep (shock velocity estimated at 955 km/sec). Region 9672 had formed a strong delta configuration earlier in period. LASCO/EIT imagery has not updated sufficiently, to be able to ascertain, if a CME was created from either of these flares. Region 9658 (rotated of west limb at S15) produced an M1/Sf at 22/0040 UTC before exiting the visible disk. New Region 9677 (N20E48) was numbered today.
IB. Prognos för solaktivitet
Solar activity is expected to be at moderate to high levels. Region 9672 remains capable of producing further M-class or isolated major flares.
IIA. Sammanfattning av geofysisk aktivitet 21-2100Z till 22-2100Z
The geomagnetic field was at minor to major storm levels. The second CME passage that had been expected today appears to have been incorporated into the first, creating minor to major storm conditions for the entire period aside from a couple isolated severe storm conditions at high latitudes. The estimated Afr (based on Boulder magnetometer) reading reached 59 and USAF planetary reached 75. The greater than 10 MeV proton flux at geosynchronous orbit exceeded threshold at 22/1910 UTC. At the time of issue of this bulletin the 10 MeV proton flux was at 17 pfu.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is expected to remain at active to major storm levels through the first part of day one. The field should return to quiet to active conditions at the end of days one and two. Day three should see minor to isolated major storm conditions return due a potential CME passage from activity seen in Region 9672 on 22 October. Protons are expected to remain above 10 MeV through the first day of period.
III. Chans för solutbrott från 23 Oct till 25 Oct
M-klass80%80%75%
X-klass40%40%30%
Proton99%50%10%
PCAFred
IV. Penticton 10.7 cm Flux
  Observerad       22 Oct 233
  Prognoserat   23 Oct-25 Oct  230/220/220
  90 Day Mean        22 Oct 192
V. Geomagnetiskt A-index
  Observerad Afr/Ap 21 Oct  029/040
  Förväntat     Afr/Ap 22 Oct  045/075
  Prognoserat    Afr/Ap 23 Oct-25 Oct  015/030-015/015-020/030
VI. Chanser för geomagnetisk aktivitet från 23 Oct till 25 Oct
A. Medelhöga breddgrader
Aktivt40%40%50%
Små stormförhållanden20%15%30%
Svåra stormförhållanden01%05%10%
B. Höga breddgrader
Aktivt60%40%40%
Små stormförhållanden30%20%40%
Svåra stormförhållanden10%05%15%

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