Vaata laupäev, 21 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 21 2200 UTCValminud NOAA © SWPC ja töödeldud SpaceWeatherLive.com-iga
Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne
SDF number 112 Välja antud 2200Z kuni 21 Apr 2012IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 20-2100Z kuni 21-2100Z Solar activity was low. Regions 1460 (N16W27 -
Dkc/beta) and 1465 (S17E27 - Dso/beta) each produced a low-level
C-class flare. Region 1460 showed minor interior spot growth and
some mixed polarities in its trailer portion. Minor interior spot
growth also occurred in Region 1465 as well as penumbral growth in
its trailer. Region 1459 (S14W13 - Eac/beta) showed penumbral growth
in its interior portion and maintained a simple beta magnetic
configuration. No Earth-directed CMEs were observed during the
period. No new regions were numbered.
IB. Päikese aktiivsuse ennustus
Solar activity is expected to be low
during the period (22 - 24 April) with a chance for an isolated
M-class flare.
IIA. Summaarne geofüüsikaline aktiivsus 20-2100Z kuni 21-2100Z
Geomagnetic field activity was at quiet levels until around 21/1900Z,
then increased to quiet to unsettled levels. The increase was
associated with a weak interplanetary shock (IPS) passage, detected
at ACE at around 21/1611Z, and followed by a weak geomagnetic field
response at around 21/1712Z (no Sudden Geomagnetic Impulse
observed). ACE solar wind data showed a change to mostly southward
IMF Bz following the IPS passage (maximum deflections to -8 nT) as
well as a gradual increase in IMF Bt (peaks to 9 nT). A minor
increase in wind speeds also followed the IPS passage. It is likely
the CME passage was associated with the partial-halo CME observed on
18 April.
IIB. Geofüüsikalise aktiivsuse ennustus
Geomagnetic field activity is
expected to be at quiet to unsettled levels during the period (22 -
24 April) with a chance for active levels. Weak CME-passage effects
are expected during 22 - 23 April (another CME is expected to arrive
late on 22 April). A recurrent coronal hole high-speed stream is
expected to become geoeffective on 24 April.
III. Sündmuste tõenäosus 22 Aprkuni 24 Apr
| Klass M | 30% | 30% | 30% |
| Klass X | 01% | 01% | 01% |
| Prooton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Pikklaine 10.7 cm kiirgus
Vaadeldud 21 Apr 149 Prognoositud 22 Apr-24 Apr 150/150/145 90 päeva keskmine 21 Apr 112
V. Geomagneetiline A-indeks
Vaadeldud Afr/Ap 20 Apr 007/008 Hinnanguline Afr/Ap 21 Apr 006/007 Prognoositud Afr/Ap 22 Apr-24 Apr 011/012-010/010-010/010
VI. Geomagnetilised aktiivsuse tõenäosused 22 Apr kuni 24 Apr
| A. Keskmistel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 20% | 20% | 25% |
| Väike torm | 10% | 10% | 15% |
| Suur-tõsine torm | 01% | 01% | 01% |
| B. Kõrgetel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 25% | 25% | 35% |
| Väike torm | 15% | 15% | 25% |
| Suur-tõsine torm | 05% | 05% | 10% |
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