Viewing archive of tisdag, 19 april 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 Apr 19 2210 UTC# Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. #
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 109 publicerat klockan 2200Z på 19 Apr 2005IA. Analys av solfläcksgrupper och solaktivitet från 18-2100Z till 19-2100Z Solar activity was very low. Region 755 (S12E49),
which was responsible for three C-class flares on 17 April,
continues to decay. A CME was observed on LASCO imagery at 19/1226
UTC directed to the northwest. The CME most likely occurred on the
backside and is not expected to be geoeffective. No new regions
were numbered today.
IB. Prognos för solaktivitet
Solar activity is expected to be very
low to low.
IIA. Sammanfattning av geofysisk aktivitet 18-2100Z till 19-2100Z
The geomagnetic field was quiet to unsettled with an isolated active
period between 0600 UTC and 0900 UTC on 19 April. The greater than
2 MeV electron flux at geosynchronous orbit was at high levels again
today.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be quiet to unsettled with the possibility of isolated
active conditions on 20 and 21 April. On 22 April, there is a
chance for increased active periods due to a recurrent coronal hole
high speed stream moving into geoeffective position.
III. Chans för solutbrott från 20 Apr till 22 Apr
| M-klass | 05% | 01% | 01% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 19 Apr 078 Prognoserat 20 Apr-22 Apr 080/080/080 90 Day Mean 19 Apr 092
V. Geomagnetiskt A-index
Observerad Afr/Ap 18 Apr 005/008 Förväntat Afr/Ap 19 Apr 008/010 Prognoserat Afr/Ap 20 Apr-22 Apr 008/012-008/010-012/015
VI. Chanser för geomagnetisk aktivitet från 20 Apr till 22 Apr
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 20% | 20% | 25% |
| Små stormförhållanden | 10% | 10% | 10% |
| Svåra stormförhållanden | 01% | 01% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 25% | 30% |
| Små stormförhållanden | 10% | 10% | 15% |
| Svåra stormförhållanden | 05% | 01% | 05% |
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Rymdvädersfakta
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