Vaata pühapäev, 18 veebruar 2024 arhiivi

SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2024 Feb 18 1230 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
18 Feb 2024	163	010
19 Feb 2024	163	010
20 Feb 2024	165	013

Päikese aktiivsed piirkonnad ja pursked

The solar flaring activity was at low levels, with several C-class flares recorded in the past 24 hours. The largest flare was a C7.9 flare, peaking at 18:34 UTC on Feb 17, associated with NOAA AR 3584 (beta). Low flaring activity was also produced by NOAA AR 3576, by NOAA 3583 (beta) and by ARs behind the east limb (N18E87). Other regions on the disc have simple configuration of their photospheric magnetic field (alpha and beta) and did not show any significant flaring activity. The solar flaring activity is expected to be mostly at low levels with several C-class flares, and possible isolated M-class flare in the next 24 hours.

Krooniaine massiline väljavool

A halo coronal mass ejection (CME) was observed in LASCO/C2 coronagraph data from 13:36 UTC on February 17th. The CME is associated to an eruption from behind the south-east limb. Based on the source location, no impact on Earth is expected. No other Earth-directed CMEs have been detected in the available coronagraph imagery over the past 24 hours.

Päikesetuul

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) were reflecting near slow solar wind conditions. The solar wind speed decreased from values around 350 km/s to 300 km/s. The interplanetary magnetic field magnitude remained below 8 nT. The southward component of the interplanetary magnetic field fluctuated between -6 nT and 5 nT. The magnetic field orientation was predominantly in the positive sector (field directed away from the Sun). Slow solar wind conditions are expected to prevail during the next days, with a chance for a weak enhancement late on Feb 19th early on Feb 20th due to possible glancing blow arrival associated with the Feb 16th filament eruption.

Geomagnetism

Geomagnetic conditions were quiet to unsettled both globally and locally (NOAA-Kp and K-BEL: 1 to 3) during the last 24 hours. Mostly quiet geomagnetic conditions are expected to prevail during the next days. Unsettled to isolated active levels might be reached on Feb 19 – Feb 20 related to possible glancing blow ICME arrival.

Prootoni voo tasemed

Over the past 24 hours the greater than 10 MeV GOES proton flux continued to decrease and, although still slightly elevated, remained below the 10pfu threshold. The proton flux is expected to continue to decrease over the next 24 hours.

Elektronivoog geostatsionaarsel orbiidil

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, remained below the 1000 pfu threshold. It is expected to remain below the threshold during the next 24 hours. The 24 hour electron fluence was at normal levels and is expected to remain at these levels for the following 24 hours.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 096, põhineb 07 jaamadel.

Päikese indeksid 17 Feb 2024

Catania Wolfi number	///
10cm päikesevoog	170
AK Chambon La Forêt	012
AK Wingst	005
Hinnanguline Ap	004
Hinnanguline rahvusvaheline päikeselaikude arv	113 - Põhineb 17 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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