Vaata kolmapäev, 29 jaanuar 2020 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2020 Jan 29 1239 UTC

SIDC ennustus

Päikesepursked ehk loited

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

	10 cm vool	Ap
29 Jan 2020	074	009
30 Jan 2020	074	007
31 Jan 2020	073	004

Bülletään

The solar activity was at very low levels with no significant solar flares observed. Catania sunspot group 28 (NOAA Active Region 2757, N04W33) remained inactive and has decayed to Hale class alpha in the past 24 hours. The solar activity is expected to remain at very low levels in the next 24 hours. Quiet flaring conditions are expected for the next 24-hour period with no significant flares expected from the decaying sunspot region NOAA 2757 in the north-western quadrant, nor from the plague region in the eastern hemisphere.

No Earth-directed coronal mass ejections (CMEs) were observed in the available coronagraph imagery. The greater than 10 MeV solar proton flux was at nominal levels and is expected to remain so.

The solar wind speed over the past 24 hours has increased from 300 to around 500 km/s (ACE) probably due to the influence of the patchy negative polarity coronal hole observed on Jan 25. The total interplanetary magnetic field reached values of 8 nT. The Bz component reached a minimum of -8 nT between 21 UTC on Jan 28th and 02 UTC on Jan 29th. The polarity of the interplanetary magnetic field was predominantly in the negative sector with short positive intervals.

The geomagnetic activity over the past 24 hours has been quiet until 21 UTC when several unsettled periods occurred, due to the arrival of the high speed stream from the negative polarity coronal hole, when both local K (Dourbes) and NOAA Kp indexes reached a value of 3. Throughout the next 24 hours the geomagnetic conditions are expected to remain predominantly quiet with isolated unsettled periods due to the remaining influence of the observed high speed stream. The CME observed by STEREO-A on Jan 25th with estimated arrival on Jan 30th might contribute to the periods with unsettled geomagnetic conditions predicted for that day.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 012, põhineb 17 jaamadel.

Päikese indeksid 28 Jan 2020

Catania Wolfi number	///
10cm päikesevoog	074
AK Chambon La Forêt	017
AK Wingst	006
Hinnanguline Ap	005
Hinnanguline rahvusvaheline päikeselaikude arv	013 - Põhineb 17 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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