Vaata kolmapäev, 17 detsember 2014 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2014 Dec 17 1232 UTC

SIDC ennustus

Päikesepursked ehk loited

Active (M-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Warning condition (activity levels expected to increase, but no numeric forecast given)

	10 cm vool	Ap
17 Dec 2014	185	008
18 Dec 2014	185	007
19 Dec 2014	180	010

Bülletään

The Sun released three M flares and four C flares during the past 24 hours. An M8.7 flare was released by NOAA AR 2242 on December 17 with peak time 04:51 UT. It was preceded by an M1.5 flare produced by AR 2242 peaking at 1:10 UT and an M1.1 flare produced by AR 2241 peaking at 1:50 UT. An associated Type II radio burst was observed by Learmonth observatory between 4:49 and 5:15 UT with an estimated speed of 910 km/s. After a data gap, LASCO C3 imagery showed a CME first detected at 9:18 UT on November 17 and probably associated to the M8.7 flare. Since AR 2242 is close to the central meridian, this CME is expected to become geoeffective. Using a speed of 910 km/s as estimated by the Type II radio burst, a tentative arrival time around UT midnight on December 19-20 is obtained. M and even X flaring from AR 2242 and AR 2241 are possible in the next 24 hours. There is a chance for proton storms in the days ahead. In the past 24 hours, solar wind speed observed by ACE fluctuated between about 370 and 470 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) was stable and mainly between 5 and 6 nT. Over the past 24 hours, geomagnetic conditions were quiet (K Dourbes between 1 and 3; NOAA Kp between 2 and 3). Quiet geomagnetic levels (K Dourbes < 4) are expected on December 17, 18 and the first half of December 19. Active to minor storm conditions are possible in the second half of December 19 in view of the expected CME arrival.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 137, põhineb 07 jaamadel.

Päikese indeksid 16 Dec 2014

Catania Wolfi number	///
10cm päikesevoog	185
AK Chambon La Forêt	016
AK Wingst	008
Hinnanguline Ap	008
Hinnanguline rahvusvaheline päikeselaikude arv	124 - Põhineb 18 jaamal

Märkimisväärsete sündmuste kokkuvõte

Andmed on esitanud Päikeseinfektide Andmeanalüüsi Keskus (Solar Influences Data Analysis Center)© - SIDC - Töötleb SpaceWeatherLive

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