Viewing archive of söndag, 20 februari 2005
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 2005 Feb 20 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 051 publicerat klockan 2200Z på 20 Feb 2005IA. Analys av solfläcksgrupper och solaktivitet från 19-2100Z till 20-2100Z Solar activity decreased to very low levels. A long
duration B-class flare was observed at 20/1628Z from just beyond the
solar west limb. This event is believed to be from Region 732 (N08
L=188) which rotated out of view on 18 February. Region 735
(S09W58) has changed little since yesterday and remains a magnetic
beta-gamma group. Region 736 (N13W50) is a weak beta magnetic
region that was numbered today.
IB. Prognos för solaktivitet
Solar activity is expected to be at
very low to low levels. Region 735 continues to show enough
complexity to possibly produce isolated C-class flare activity.
IIA. Sammanfattning av geofysisk aktivitet 19-2100Z till 20-2100Z
The geomagnetic field was at predominantly quiet to unsettled levels.
An isolated active period did occur between 20/2400 and 0300Z that
appears to be due to a recurrent high speed coronal hole stream.
The coronal hole has been waning throughout the period and current
solar wind speeds have dropped to near 400 km/s. The greater than 2
MeV electron flux at geosynchronous orbit reached high levels again
today.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be at predominantly quiet to unsettled levels throughout
the period.
III. Chans för solutbrott från 21 Feb till 23 Feb
| M-klass | 10% | 10% | 10% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 20 Feb 096 Prognoserat 21 Feb-23 Feb 095/095/090 90 Day Mean 20 Feb 101
V. Geomagnetiskt A-index
Observerad Afr/Ap 19 Feb 008/014 Förväntat Afr/Ap 20 Feb 006/010 Prognoserat Afr/Ap 21 Feb-23 Feb 005/005-007/010-007/012
VI. Chanser för geomagnetisk aktivitet från 21 Feb till 23 Feb
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 01% | 01% | 01% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 20% | 25% |
| Små stormförhållanden | 05% | 05% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
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Rymdvädersfakta
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