Vaata teisipäev, 20 detsember 2022 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2022 Dec 20 1232 UTC

SIDC ennustus

Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

	10 cm vool	Ap
20 Dec 2022	152	012
21 Dec 2022	152	012
22 Dec 2022	152	007

Bülletään

The solar flaring activity was at low levels. There are many sunspot regions currently on the solar surface visible from Earth and several C-class flares were recorded coming from bipolar sunspot regions (Beta magnetic class: NOAA-AR 3160, 3163, 3167, 3169, 3170, 3171). The larger flare was a C8.1-class from the NOAA-AR 3170 peaking at 08:53 UTC on December 20. The flaring activity over the next 24 hours is expected to remain at low levels, with C-class flares expected and a small possibility for M-class flares.

Several coronal mass ejections flows were observed in the available SOHO/LASCO coronagraph imagery and automatically detected by the Cactus tool over the past 24 hours. However, no clear Earth-directed coronal mass ejections were identified.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux was below the 1000 pfu threshold over the past 24 hours and is expected to remain below the 1000 pfu threshold over the next 24 hours. The electron fluence was at normal to low levels and is expected to stay at normal levels over the next 24 hours.

The solar wind parameters are slightly enhanced. The solar wind speed remained slow around 350-400 km/s however, the total interplanetary magnetic field was enhanced and reaches values up to 15.3 nT with the southward interplanetary magnetic component, Bz, ranging between -7.1 nT and 13.4 nT. This enhancement of the solar wind parameters could be associated with the negative polarity coronal hole in the southern hemisphere, which began to cross the central meridian on December 14. Later today, we are expecting the arrival of another high-speed stream, associated with the positive polarity, equatorial coronal hole that started to cross the central meridian on December 17.

During the last 24 hours, the geomagnetic conditions were quiet (NOAA- Kp=1-2) with short periods of unsettled condition observed locally in Belgium (K-BEL=3) due to the southward interplanetary magnetic component, Bz, being negative for a relatively longer periods. Geomagnetic conditions are expected to be unsettled to active in the next days, due to the arrival of the previously mentioned high-speed streams.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 118, põhineb 08 jaamadel.

Päikese indeksid 19 Dec 2022

Catania Wolfi number	141
10cm päikesevoog	152
AK Chambon La Forêt	014
AK Wingst	010
Hinnanguline Ap	010
Hinnanguline rahvusvaheline päikeselaikude arv	121 - Põhineb 06 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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