Vaata reede, 20 aprill 2012 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 2012 Apr 20 2200 UTCValminud NOAA © SWPC ja töödeldud SpaceWeatherLive.com-iga
Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne
SDF number 111 Välja antud 2200Z kuni 20 Apr 2012IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 19-2100Z kuni 20-2100Z Solar activity was low. New Region 1465 (S17E39 -
Dao/beta) emerged early in the period and showed significant growth.
It produced occasional C-class flares including a C1/1f
parallel-ribbon flare at 20/1501Z. Regions 1459 (S16E01 - Dai/beta),
1460 (N15W15 - Dkc/beta), and 1462 (S25W46 - Dho/beta) also showed
significant growth during the period. Region 1462 produced an
isolated C-class flare as it grew. There were no Earth-directed CMEs
during the period.
IB. Päikese aktiivsuse ennustus
Solar activity is expected to be low
through the period (21 - 23 April) with a chance for an isolated
M-class flare.
IIA. Summaarne geofüüsikaline aktiivsus 19-2100Z kuni 20-2100Z
Geomagnetic activity was at quiet to unsettled levels with brief
active periods at high latitudes. ACE solar wind data indicated the
minor increase in activity was due to a solar sector boundary
crossing (SSBC) at approximately 20/0700Z. The SSBC was associated
with increased IMF Bt (maximum 8 nT at 20/1059Z) and a period of
sustained southward IMF Bz (maximum deflections to -7 nT around
20/0400Z).
IIB. Geofüüsikalise aktiivsuse ennustus
Geomagnetic field activity is
expected to be at quiet levels during the first half of day 1 (21
April). Activity is forecast to increase to unsettled levels with a
chance for active levels beginning around 21/1500Z and continuing
into day 3 (23 April) due to expected glancing blows from the
partial-halo CMEs observed on 18 and 19 April. There will also be a
slight chance for minor storm levels on day 1.
III. Sündmuste tõenäosus 21 Aprkuni 23 Apr
| Klass M | 30% | 30% | 30% |
| Klass X | 01% | 01% | 01% |
| Prooton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Pikklaine 10.7 cm kiirgus
Vaadeldud 20 Apr 142 Prognoositud 21 Apr-23 Apr 150/150/150 90 päeva keskmine 20 Apr 112
V. Geomagneetiline A-indeks
Vaadeldud Afr/Ap 19 Apr 005/005 Hinnanguline Afr/Ap 20 Apr 007/007 Prognoositud Afr/Ap 21 Apr-23 Apr 014/015-011/012-010/012
VI. Geomagnetilised aktiivsuse tõenäosused 21 Apr kuni 23 Apr
| A. Keskmistel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 25% | 20% | 20% |
| Väike torm | 10% | 05% | 05% |
| Suur-tõsine torm | 01% | 01% | 01% |
| B. Kõrgetel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 30% | 25% | 25% |
| Väike torm | 15% | 10% | 10% |
| Suur-tõsine torm | 05% | 01% | 01% |
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