Vaata pühapäev, 20 mai 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 May 20 2200 UTCValminud NOAA © SWPC ja töödeldud SpaceWeatherLive.com-iga
Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne
SDF number 141 Välja antud 2200Z kuni 20 May 2012IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 19-2100Z kuni 20-2100Z Solar activity was at very low levels. New Region 1487
(N19W05) emerged on the disk as a simple bi-polar group. Region 1483
(S25W43) developed additional trailer spots and is now classified as
a D-type group. All other regions were quiet and stable. No
Earth-directed CMEs were observed during the period.
IB. Päikese aktiivsuse ennustus
Solar activity is expected to be at
predominately low levels for the next three days (21 - 23 May). A
slight chance for M-class activity exists all three days.
IIA. Summaarne geofüüsikaline aktiivsus 19-2100Z kuni 20-2100Z
The geomagnetic field was at quiet to active levels with an isolated
minor storm interval during the 20/0300 - 0600Z period. At about
20/0136Z, the ACE satellite observed an interplanetary (IP) shock
passage with a corresponding weak sudden impulse observed at the
Boulder magnetometer (15 nT) at 20/0215Z. Prior to the IP shock,
solar wind velocities were generally in the 400 km/s range, the Bz
component of the interplanetary magnetic field (IMF) varied between
+/- 3 nT and the total field (Bt) was at 5 nT. Following the shock,
wind speeds increased to about 475 km/s, Bz varied between +/- 8 nT
and Bt increased to about 8 nT. The shock likely indicated the
arrival of the 17 May CME.
IIB. Geofüüsikalise aktiivsuse ennustus
The geomagnetic field is
expected to be at predominately quiet levels for day one (21 May).
By days two and three (22 - 23 May), quiet to unsettled levels with
a slight chance for isolated active periods are expected due to
coronal hole high speed stream effects coupled with the arrival of
the 18 May CME.
III. Sündmuste tõenäosus 21 Maykuni 23 May
| Klass M | 15% | 15% | 15% |
| Klass X | 05% | 05% | 05% |
| Prooton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Pikklaine 10.7 cm kiirgus
Vaadeldud 20 May 131 Prognoositud 21 May-23 May 130/130/135 90 päeva keskmine 20 May 116
V. Geomagneetiline A-indeks
Vaadeldud Afr/Ap 19 May 005/005 Hinnanguline Afr/Ap 20 May 010/012 Prognoositud Afr/Ap 21 May-23 May 007/006-010/010-007/010
VI. Geomagnetilised aktiivsuse tõenäosused 21 May kuni 23 May
| A. Keskmistel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 10% | 20% | 20% |
| Väike torm | 01% | 10% | 10% |
| Suur-tõsine torm | 01% | 01% | 01% |
| B. Kõrgetel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 10% | 25% | 25% |
| Väike torm | 01% | 15% | 15% |
| Suur-tõsine torm | 01% | 01% | 01% |
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