Vaata kolmapäev, 17 märts 2021 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2021 Mar 17 1230 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
17 Mar 2021	079	003
18 Mar 2021	077	004
19 Mar 2021	077	023

Bülletään

Solar activity was very low in the past 24 hours, no C-class flares were recorded. NOAA Active Region (AR) 2808 has decayed into a plage region. The new active region, is now numbered as Catania group 81 (NOAA AR 2810) and has been quiet. Overall, solar activity is expected to remain at very low levels, with a small chance of a C-class flare.

A back-sided partial halo Coronal Mass Ejections (CME) was first seen at 10:24 UT on the 16th March in LASCO-C2 images. It is not expected to arrive at Earth. No Earth-directed CMEs have been observed in the available coronagraph data.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux exceeded the 1000 pfu threshold during the last 24 hours and is expected to remain above the threshold for the next 24 hours. The 24h electron fluence was at moderate levels and it is expected to remain at this level in the next 24 hours.

Solar wind speed continued to decrease in the last 24 hours with values between 400 km/s and 340 km/s. The total interplanetary magnetic field was between 0 and 6 nT during the last 24 hours. The magnetic field phi angle switched from negative to mostly positive after approximately 18:00 UT March 16th. Solar wind conditions are expected to generally reflect a slow solar wind regime during March 17th and 18th. On March 19th the solar wind high speed stream associated with the corona hole, which crossed that solar central meridian on 17th March, is expected to arrive.

Geomagnetic conditions were at quiet levels (NOAA Kp 0-2 and local K Dourbes 1-2). Geomagnetic conditions are expected to be at quiet levels over the next 24 hours. However, the geomagnetic conditions are expected to reach active levels on the 19th March, due to the expected high speed stream.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 011, põhineb 11 jaamadel.

Päikese indeksid 16 Mar 2021

Catania Wolfi number	///
10cm päikesevoog	079
AK Chambon La Forêt	007
AK Wingst	003
Hinnanguline Ap	002
Hinnanguline rahvusvaheline päikeselaikude arv	020 - Põhineb 20 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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