Viewing archive of lördag, 26 april 2008
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 2008 Apr 26 2203 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 117 publicerat klockan 2200Z på 26 Apr 2008IA. Analys av solfläcksgrupper och solaktivitet från 25-2100Z till 26-2100Z Solar activity was very low. The solar disk is void of
spots. Nonetheless there was a B3/Sf flare at 1408Z from an
unnumbered area of spotless plage near N08E09. The flare was
associated with a wave that was visible in EUV imagery on STEREO and
SOHO, type II and type IV radio sweeps, as well as a slow, faint,
full halo CME visible in coronagraph imagery. The estimated plane of
sky speed for the CME was around 430-480 km/s.
IB. Prognos för solaktivitet
Solar activity is expected to be very
low.
IIA. Sammanfattning av geofysisk aktivitet 25-2100Z till 26-2100Z
The geomagnetic field was quiet to unsettled during the past 24
hours. Solar wind speed remains somewhat elevated (around 460-500
km/s) and density very low (around 1 p/cc), consistent with the
decaying phase of a high speed stream. The greater than 2 MeV
electron flux at geosynchronous orbit was high during the past 24
hours.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be predominantly quiet for the next two days (27-28
April). A small increase is expected late on the third day (29
April) in response to today's CME event: activity is expected to be
unsettled with a chance for isolated active periods after the
disturbance arrives.
III. Chans för solutbrott från 27 Apr till 29 Apr
| M-klass | 01% | 01% | 01% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observerad 26 Apr 069 Prognoserat 27 Apr-29 Apr 070/070/070 90 Day Mean 26 Apr 071
V. Geomagnetiskt A-index
Observerad Afr/Ap 25 Apr 007/008 Förväntat Afr/Ap 26 Apr 007/008 Prognoserat Afr/Ap 27 Apr-29 Apr 005/005-005/005-007/008
VI. Chanser för geomagnetisk aktivitet från 27 Apr till 29 Apr
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 10% | 20% |
| Små stormförhållanden | 05% | 05% | 10% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 10% | 25% |
| Små stormförhållanden | 05% | 05% | 10% |
| Svåra stormförhållanden | 01% | 01% | 05% |
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