Viewing archive of söndag, 25 april 2004
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 2004 Apr 25 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 116 publicerat klockan 2200Z på 25 Apr 2004IA. Analys av solfläcksgrupper och solaktivitet från 24-2100Z till 25-2100Z Solar activity was moderate. Region 599 (N16E28)
produced an M2/1N flare today at 0537 UTC, as well as a number of
smaller, C-class events. The group continued to grow today, and
shows some magnetic complexity, particularly just behind the large
leader spot where smaller spots of opposite polarity are in close
proximity. Most of the flare brightenings occurred along an
east-west inversion line in the mid-to-trailing portion of the
region. Region 536 (S08W36) is still the largest group on the disk,
but was quiet and appears to be slowly decaying.
IB. Prognos för solaktivitet
Solar activity is expected to be
mostly low, but there is a fair chance for an additional, isolated
M-class event during the next three days from Region 599.
IIA. Sammanfattning av geofysisk aktivitet 24-2100Z till 25-2100Z
The geomagnetic field was mostly unsettled. There was an isolated
active period at high latitudes from 0600-0900 UTC. Solar wind data
show continuation of a weak, high-speed stream, with velocities
ranging mostly between 500-550 km/s.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field should
persist at the current, mostly unsettled levels for the next 24-36
hours (26 April to partway through 27 April). A decrease is expected
to begin partway through the 2nd day (27 April) and quiet to
unsettled levels should prevail on the third day (28 April).
III. Chans för solutbrott från 26 Apr till 28 Apr
| M-klass | 35% | 35% | 35% |
| X-klass | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 25 Apr 107 Prognoserat 26 Apr-28 Apr 110/110/110 90 Day Mean 25 Apr 107
V. Geomagnetiskt A-index
Observerad Afr/Ap 24 Apr 007/011 Förväntat Afr/Ap 25 Apr 010/010 Prognoserat Afr/Ap 26 Apr-28 Apr 012/012-010/010-005/008
VI. Chanser för geomagnetisk aktivitet från 26 Apr till 28 Apr
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 20% | 15% |
| Små stormförhållanden | 20% | 15% | 10% |
| Svåra stormförhållanden | 10% | 05% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 35% | 30% | 25% |
| Små stormförhållanden | 25% | 20% | 15% |
| Svåra stormförhållanden | 15% | 10% | 05% |
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