Vaata kolmapäev, 20 aprill 2005 arhiivi
Päikese aktiivsuse aruanne
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.
Päikese ja geofüüsikalise aktiivsuse aruanne 2005 Apr 20 2210 UTC# Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. #
Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne
SDF number 110 Välja antud 2200Z kuni 20 Apr 2005IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 19-2100Z kuni 20-2100Z Solar activity was very low. Region 755 (S12E37)
produced a B 8 flare at 19/2217 UTC with an associated Type II radio
sweep (estimated speed of 1128 km/s) and a CME with an estimated
speed of 776 km/s. The CME was directed to the east and is not
expected to be geoeffective. No new regions were numbered today.
IB. Päikese aktiivsuse ennustus
Solar activity is expected to be very
low with a slight chance for an isolated C-flare.
IIA. Summaarne geofüüsikaline aktiivsus 19-2100Z kuni 20-2100Z
The geomagnetic field was at quiet to minor storm levels. Heightened
activity was due to a solar sector boundary followed by the onset of
a coronal hole high speed stream. Solar wind speed at ACE increased
from approximately 350 km/s to 600 km/s. By the end of the period,
solar wind speed had decreased to approximately 450 km/s.
IIB. Geofüüsikalise aktiivsuse ennustus
The geomagnetic field is
expected to be quiet to unsettled with isolated active conditions
possible on 21 April. On 22 April, conditions are expected to
increase to unsettled to active with minor storm periods possible as
another coronal hole high speed stream is expected to become
geoeffective. On 23 April, unsettled to active conditions are
expected.
III. Sündmuste tõenäosus 21 Aprkuni 23 Apr
| Klass M | 01% | 01% | 01% |
| Klass X | 01% | 01% | 01% |
| Prooton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Pikklaine 10.7 cm kiirgus
Vaadeldud 20 Apr 077 Prognoositud 21 Apr-23 Apr 080/080/080 90 päeva keskmine 20 Apr 091
V. Geomagneetiline A-indeks
Vaadeldud Afr/Ap 19 Apr 006/008 Hinnanguline Afr/Ap 20 Apr 015/020 Prognoositud Afr/Ap 21 Apr-23 Apr 010/015-015/018-012/015
VI. Geomagnetilised aktiivsuse tõenäosused 21 Apr kuni 23 Apr
| A. Keskmistel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 25% | 30% | 25% |
| Väike torm | 10% | 15% | 10% |
| Suur-tõsine torm | 01% | 05% | 05% |
| B. Kõrgetel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 30% | 30% | 30% |
| Väike torm | 15% | 15% | 15% |
| Suur-tõsine torm | 05% | 05% | 05% |
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