Het archief bekijken van vrijdag 28 september 2012
Activiteitenrapport
Bij elke genoemde zonnevlam in dit rapport werd een schaalfactor toegepast door het Space Weather Prediction Center (SWPC). Vanwege de SWPC-schaalfactor worden zonnevlammen 42% kleiner gerapporteerd dan voor de wetenschappelijke data. De schaalfactor werd verwijderd uit onze gearchiveerde zonnevlamdata om de werkelijke fysieke eenheden weer te geven.
Rapport van de zonne- en geofysische activiteit van 2012 Sep 28 2200 UTC
Opgemaakt door de NOAA © SWPC en verwerkt door Poollicht.beUSAF/NOAA rapport van de zonneactiviteit en geofysische activiteit
SDF Nummer 272 gepubliceerd omstreeks 2200Z op 28 Sep 2012
IA. Analyse van de actieve zonneregio's en zonneactiviteit van 27-2100Z tot 28-2100Z
Solar activity was at low levels. Region 1577 (N08W41)
produced a long duration C3/1f flare at 27/2357Z. The event began
with a filament eruption located northwest of and adjacent to the
region with a subsequent dual ribbon flare. Associated with this
event was an Earth-directed, asymmetric, full-halo CME first visible
in SOHO LASCO C2 and C3 imagery at 28/0018Z and 28/0030Z,
respectively. The plane-of-sky speed through both fields averaged
1034 km/s with a computed radial velocity of 872 km/s. Little
change was observed for the remainder of the disk and limb. No
other Earth-directed CMEs were observed.
IB. Voorspelling zonneactiviteit
Solar activity is expected to be at
low levels with a slight chance for M-class activity all three days
of the forecast period (29 - 30 September and 01 October).
IIA. Samenvatting geofysische activiteit 27-2100Z tot 28-2100Z
The geomagnetic field was at quiet levels. ACE satellite
measurements indicated a steady decline in wind velocity from about
400 km/s to near 325 km/s while the Bz component of the
interplanetary magnetic field did not vary much beyond +/- 2 nT.
The greater than 10 MeV proton flux at geosynchronous orbit exceeded
threshold at 28/0300Z, reached a maximum of 28 pfu at 28/0445Z and
decayed below threshold at 28/1040Z. At the time of this report,
flux levels were still elevated at about 5 pfu. This event was
believed to be associated with the C3/1f flare observed late on 27
September.
IIB. Voorspelling geofysische activiteit
Geomagnetic field activity is
expected to be at predominately quiet levels on day one (29
September) and through midday on day two (30 September). By late
on day two, active levels with a chance for minor to major storm
periods are expected due to the arrival of the Earth-directed CME
observed early on 28 September. On day three (01 October),
continued minor to major storm conditions are expected early in the
day, decreasing to mostly quiet to unsettled levels with isolated
active periods as effects from the CME wane.
III. Kans zonnevlammen van 29 Sep tot 01 Oct
Klasse M | 10% | 10% | 10% |
Klasse X | 01% | 01% | 01% |
Proton | 01% | 01% | 01% |
PCAF | green
|
IV. Penticton 10.7 cm Flux
Geobserveerd 28 Sep 138
Voorspeld 29 Sep-01 Oct 135/135/130
90 dagen gemiddelde 28 Sep 125
V. Geomagnetische A index
Geobserveerd Afr/Ap 27 Sep 003/004
Geraamd Afr/Ap 28 Sep 002/003
Voorspeld Afr/Ap 29 Sep-01 Oct 004/005-018/035-018/025
VI. Kansen op geomagnetische activiteit van 29 Sep tot 01 Oct
A. Gemiddelde breedtegraad |
Actief | 05% | 35% | 35% |
Kleine storm | 01% | 25% | 30% |
Zware-ernstige stormcondities | 01% | 05% | 05% |
B. Hoge breedtegraad |
Actief | 15% | 10% | 10% |
Kleine storm | 15% | 25% | 25% |
Zware-ernstige stormcondities | 05% | 50% | 65% |
Alle tijden in UTC
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