Vaata esmaspäev, 18 september 2017 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2017 Sep 18 1242 UTC

SIDC ennustus

Päikesepursked ehk loited

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Päikese prootonid

Quiet

	10 cm vool	Ap
18 Sep 2017	073	022
19 Sep 2017	073	008
20 Sep 2017	073	007

Bülletään

Over the past 24 hours the Earth side solar activity was very low and no flaring activity has been recorded. The only region presented on the Earth side disk, Catania sunspot group 55 (NOAA region 2680), has declining and is unlikely to produce any flaring activity above the B-class level. The solar activity on the back side is more active with several coronal mass ejections (CME) observed in SOHO/LASCO coronagraph. More back-side CMEs can be expected, including halo CME as the very active Catania group 46 (NOAA region 2673) is located close to the center.

No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The Earth remained in the fast solar wind with a speed around 600 and 700 Km/s, associated with a low-latitude extension of the northern polar coronal hole which reached central meridian on September 09. The interplanetary magnetic field magnitude remained between 5 and 6 nT, and the Bz component fluctuating between -6 and 5 nT being mainly negative.

Disturbed geomagnetic conditions were observed with K-Dourbes up to 4 and Kp-NOAA up to 5 due to the fast solar wind and the southward Bz component of the interplanetary magnetic field over several consecutive intervals. The geomagnetic conditions are expected to vary between unsettled to active conditions and even minor storm conditions may be observed in the coming hours, in particular, if the Bz component stays negative for longer periods. We expect quiet to unsettled geomagnetic conditions as the high speed stream will decrease.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 014, põhineb 22 jaamadel.

Päikese indeksid 17 Sep 2017

Catania Wolfi number	///
10cm päikesevoog	072
AK Chambon La Forêt	030
AK Wingst	016
Hinnanguline Ap	019
Hinnanguline rahvusvaheline päikeselaikude arv	015 - Põhineb 28 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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