Viewing archive of lördag, 24 september 2011
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 2011 Sep 24 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 267 publicerat klockan 2200Z på 24 Sep 2011IA. Analys av solfläcksgrupper och solaktivitet från 23-2100Z till 24-2100Z Solar activity was high. Region 1302 (N12E47) produced
a X1/2b flare at 24/0940Z, a M7 long duration x-ray flare at
24/1320Z, and a M5 x-ray flare at 24/2036Z. Coronal mass ejections
(CMEs) were observed in association with the first two of these
events. The second CME, which was must faster, appears to overtake
the first, and has a partial halo signature from the LASCO/Earth
perspective. Estimate speeds of the CME range between 1900 - 2600
km/s. Region 1302 produced three other flares greater than M1 during
the period. Region 1295 (N26W84) produced a M3 x-ray flare at
24/1725Z. Another large sunspot is beginning to emerge around the
East limb of the disk near N15.
IB. Prognos för solaktivitet
Solar activity is expected to be high
to very high for the next 3 days (25-27 September) due to the
activity produced by Region 1302.
IIA. Sammanfattning av geofysisk aktivitet 23-2100Z till 24-2100Z
The geomagnetic field was quiet. The greater than 10MeV proton flux
at geosynchronous orbit exceeded the 10 pfu threshold at 23/2255Z,
peaked at 12 pfu during the day, and remains above threshold at the
time of this report. The noon F10 solar flux was observed at 190,
but is believed to be enhanced by the flares which occurred today.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be mostly quiet to unsettled on day 1 (25 September) due
to recurrent coronal hole effects. Conditions are forecast to
increase to unsettled to minor storm levels with the chance for a
major storm starting late on day 1 through midday on day 2 (26
September) due to the anticipated partial impact from the CME from
earlier today. Conditions are forecast to carry over to day 3 (27
September) with mostly unsettled to active periods expected. The
greater than 10 MeV proton flux is expected to remain above the 10
pfu threshold for days 1 and 2, before decreasing on day 3.
III. Chans för solutbrott från 25 Sep till 27 Sep
| M-klass | 80% | 80% | 80% |
| X-klass | 40% | 40% | 40% |
| Proton | 99% | 99% | 80% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observerad 24 Sep 190 Prognoserat 25 Sep-27 Sep 160/160/160 90 Day Mean 24 Sep 107
V. Geomagnetiskt A-index
Observerad Afr/Ap 23 Sep 002/003 Förväntat Afr/Ap 24 Sep 005/005 Prognoserat Afr/Ap 25 Sep-27 Sep 010/010-025/030-012/012
VI. Chanser för geomagnetisk aktivitet från 25 Sep till 27 Sep
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 40% | 10% | 10% |
| Små stormförhållanden | 30% | 50% | 40% |
| Svåra stormförhållanden | 01% | 30% | 20% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 40% | 10% | 10% |
| Små stormförhållanden | 30% | 60% | 60% |
| Svåra stormförhållanden | 01% | 30% | 30% |
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