Vaata neljapäev, 18 aprill 2019 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2019 Apr 18 1230 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
18 Apr 2019	076	001
19 Apr 2019	075	008
20 Apr 2019	073	006

Bülletään

Solar activity was at very low levels. The two currently visible sunspot groups are quiet. A small-sized coronal dimming (location: S45E10 at 21UT) was observed following a magnetic reconnection event during the afternoon of 17 April. No earth-directed coronal mass ejections were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind speed gradually decreased from 340 km/s to its current values near 300 km/s (DSCOVR). Bz varied between -4 and +4 nT, with a positive stretch from 20UT till 05UT. The interplanetary magnetic field was directed towards the Sun (negative sector). Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue, with a chance on an unsettled interval on 19-20 April due to anticipated effects from a sector boundary crossing and from a weak wind stream related to a diffuse extension of the positive polarity polar coronal hole.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 027, põhineb 22 jaamadel.

Päikese indeksid 17 Apr 2019

Catania Wolfi number	012
10cm päikesevoog	076
AK Chambon La Forêt	008
AK Wingst	///
Hinnanguline Ap	006
Hinnanguline rahvusvaheline päikeselaikude arv	015 - Põhineb 27 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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