Viewing archive of onsdag, 25 maj 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 May 25 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 145 publicerat klockan 2200Z på 25 May 2011IA. Analys av solfläcksgrupper och solaktivitet från 24-2100Z till 25-2100Z Solar activity was very low. Only low level B-class
events were observed during the period. Region 1220 (N12, L=249)
produced a long duration B2 event at 24/2237Z prior to its rotation
around the west limb. Region 1218 (S16W28) also produced B-class
events with frequent point brightenings within the region. This
region remains a spotless plage. A nine degree filament located at
N44E37 disappeared between 25/0801-1256Z. A further analysis of
this event will be performed as image data updates for any
associated CME activity. New Region 1222 (N15W24) was numbered
today.
IB. Prognos för solaktivitet
Solar activity is expected to be very
low.
IIA. Sammanfattning av geofysisk aktivitet 24-2100Z till 25-2100Z
The geomagnetic field was quiet. Solar wind speeds observed by the
ACE spacecraft have averaged around 380 km/s through the period with
occasional minor fluctuations in the IMF Bz between -4/+5 nT.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be mostly quiet on day one (26 May). Quiet to unsettled
conditions, with isolated active levels, are expected for days two
and three (27-28 May) as a recurrent coronal hole high speed stream
becomes geo-effective.
III. Chans för solutbrott från 26 May till 28 May
| M-klass | 01% | 01% | 01% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 25 May 080 Prognoserat 26 May-28 May 080/080/080 90 Day Mean 25 May 108
V. Geomagnetiskt A-index
Observerad Afr/Ap 24 May 005/006 Förväntat Afr/Ap 25 May 003/005 Prognoserat Afr/Ap 26 May-28 May 005/008-010/012-015/015
VI. Chanser för geomagnetisk aktivitet från 26 May till 28 May
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 05% | 20% | 25% |
| Små stormförhållanden | 01% | 05% | 10% |
| Svåra stormförhållanden | 01% | 01% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 30% | 35% |
| Små stormförhållanden | 05% | 10% | 15% |
| Svåra stormförhållanden | 01% | 05% | 05% |
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