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Solaktivitetsrapport

Rapport för sol- och geofysisk aktivitet 2012 Jan 23 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 023 publicerat klockan 2200Z på 23 Jan 2012

IA. Analys av solfläcksgrupper och solaktivitet från 22-2100Z till 23-2100Z

Solar activity reached high levels. Region 1402 (N28W36) produced a long-duration M8/2b flare at 23/0359Z. Associated with this event were multi-frequency radio emissions spanning 25 MHz through 15.4 GHz including a 5100 sfu Tenflare. SOHO/LASCO observed an asymmetric, full-halo CME, first observed in C2 imagery at 27/0412Z as a bright halo over the northern hemisphere. Model output suggests potential Earth impact midday on 24 January. Region 1402 showed some umbral separation in the large leader spot. Region 1401 (N16W39) produced a C1/Sf at 23/2011Z. The remainder of the disk was quiet and stable.
IB. Prognos för solaktivitet
Solar activity is expected to be low during the period (24 - 26 January) with M-class activity likely from Regions 1401 and 1402.
IIA. Sammanfattning av geofysisk aktivitet 22-2100Z till 23-2100Z
The geomagnetic field ranged from quiet to minor storms levels. The period began with active to minor storm conditions as the field was under the influence of the 19 January CME. By 23/0600Z, the field became mostly quiet to unsettled. Solar wind speeds began the period at about 450 km/s while the Bz component of the interplanetary magnetic field (IMF) was at about -10 nT. By about 0630Z, wind speeds dropped sharply to near 300 km/s, density dropped to near 0 p/cc and IMF Bz turned northward. These signatures were consistent with a possible reverse shock at the back end of the CME. The greater than 10 MeV proton flux at greater than or equal to 10 pfu and the greater than 100 MeV proton flux at greater than or equal to 1 pfu at geosynchronous orbit were above threshold during the period. The 10 MeV event began at 23/0530Z and reached at maximum of 3100 pfu at 23/1940Z. The 100 MeV event began at 23/0445Z and reached a maximum of 2.3 pfu at 23/0750Z. Both events were still in progress at the time of this report.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is expected to range from quiet to isolated severe storm levels on day one (24 January). Mostly quiet levels are expected through midday on 24 January when the anticipated arrival of the 23 January CME is expected to affect the field. Active to major storm levels, with isolated severe storm periods, are expected for the remainder of day one. By day two (25 January), field activity is expected to decrease to unsettled to active levels, with isolated minor storm periods, as effects from the CME wane. Day three (26 January) should see a return to mostly quiet conditions.
III. Chans för solutbrott från 24 Jan till 26 Jan
M-klass60%60%60%
X-klass10%10%10%
Proton99%99%50%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observerad       23 Jan 144
  Prognoserat   24 Jan-26 Jan  145/145/145
  90 Day Mean        23 Jan 143
V. Geomagnetiskt A-index
  Observerad Afr/Ap 22 Jan  022/024
  Förväntat     Afr/Ap 23 Jan  008/009
  Prognoserat    Afr/Ap 24 Jan-26 Jan  022/042-018/020-005/005
VI. Chanser för geomagnetisk aktivitet från 24 Jan till 26 Jan
A. Medelhöga breddgrader
Aktivt15%30%05%
Små stormförhållanden35%15%01%
Svåra stormförhållanden20%01%01%
B. Höga breddgrader
Aktivt20%40%10%
Små stormförhållanden50%25%05%
Svåra stormförhållanden30%10%01%

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