Vaata neljapäev, 17 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 17 2200 UTCValminud NOAA © SWPC ja töödeldud SpaceWeatherLive.com-iga
Ühine USAF / NOAA päikese- ja geofüüsikaalase aktiivsuse aruanne
SDF number 138 Välja antud 2200Z kuni 17 May 2012IA. Päikese aktiivsete piirkondade ja päikeseaktiivsuse analüüs alates 16-2100Z kuni 17-2100Z Solar activity was at high levels due to an M5/1f flare
at 17/0147Z that occurred from Region 1476 (N12W89) as it was
approaching the west limb. Associated with the flare was Type II
(645 km/s) and IV radio sweeps as well as a partial halo CME with an
estimated plane-of-sky speed of approximately 1200 km/s. The
majority of the ejecta was directed off the west limb as seen in
SOHO/LASCO C3 imagery beginning at 17/0206Z, however a shock
enhancement in the interplanetary magnetic field is expected from
the event. Further analysis is pending.
IB. Päikese aktiivsuse ennustus
Solar activity is expected to be at
predominantly low levels with a slight chance for M-class activity
for all three days of the period (18 - 20 May).
IIA. Summaarne geofüüsikaline aktiivsus 16-2100Z kuni 17-2100Z
The geomagnetic field was at quiet to active levels. An isolated
active period was observed during the 16/2100Z - 2400Z period due to
a prolonged southward period of the Bz component of the
interplanetary magnetic field. A >10 MeV and >100 MeV proton event
at geosynchronous orbit was observed associated with the M5 flare.
The >10 MeV event began at 17/0210Z, crossed the 100 pfu threshold
(S2) at 17/0245Z, reached a max of 255 pfu at 17/0430Z, and fell
below 100 pfu at 17/0945Z. The greater than 100 MeV proton event
began at 17/0200Z and reached a max of 20.4 pfu. Both events were
still in progress at the time of this report.
IIB. Geofüüsikalise aktiivsuse ennustus
The geomagnetic field is
expected to be mostly quiet during the first half of day 1 (18 May).
Around mid to late on day 1, a shock arrival is expected from the
partial halo CME associated with the 17 May M5 flare. Active to
minor storm conditions are expected. Early on day 2 (19 May),
unsettled to active conditions are expected, returning to quiet to
unsettled levels by the end of the day. Quiet to unsettled
conditions are expected on day 3 (20 May).
III. Sündmuste tõenäosus 18 Maykuni 20 May
| Klass M | 20% | 10% | 10% |
| Klass X | 05% | 01% | 01% |
| Prooton | 70% | 20% | 05% |
| PCAF | yellow | ||
IV. Pikklaine 10.7 cm kiirgus
Vaadeldud 17 May 136 Prognoositud 18 May-20 May 135/135/135 90 päeva keskmine 17 May 115
V. Geomagneetiline A-indeks
Vaadeldud Afr/Ap 16 May 008/009 Hinnanguline Afr/Ap 17 May 006/006 Prognoositud Afr/Ap 18 May-20 May 011/015-010/008-007/005
VI. Geomagnetilised aktiivsuse tõenäosused 18 May kuni 20 May
| A. Keskmistel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 35% | 30% | 10% |
| Väike torm | 25% | 15% | 05% |
| Suur-tõsine torm | 10% | 05% | 01% |
| B. Kõrgetel laiuskraadidel | |||
|---|---|---|---|
| Aktiivne | 35% | 35% | 15% |
| Väike torm | 40% | 25% | 10% |
| Suur-tõsine torm | 15% | 10% | 05% |
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