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SIDC igapäevane bülletään päikese ja geomagnetilise aktiivsuse kohta

Välja antud: 2025 Mar 20 1240 UTC

SIDC ennustus

Päikesepursked ehk loited

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

	10 cm vool	Ap
20 Mar 2025	176	010
21 Mar 2025	170	010
22 Mar 2025	164	011

Päikese aktiivsed piirkonnad ja pursked

A total of 10 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity was moderate, with 1 M-class flare identified. The largest flare was a M1.5 flare (SIDC Flare 3879) peaking on March 19 at 20:40 UTC, which was produced by SIDC Sunspot Group 440 (NOAA Active Region 4031). This region is the most magnetically complex region on disk with a Beta-Gamma magnetic configuration. SIDC 433 (NOAA 4022) has started to rotate over the west limb. Solar flaring activity is expected to be moderate over the next 24 hours, with C-class flares expected and M-class flares likely.

Krooniaine massiline väljavool

A filament eruption on the west limb was detected in SDO/AIA 30.4 nm imagery around 22:50 UTC on March 19. An associated coronal mass ejection (CME) is visible in LASCO/C2 imagery around 23:36 UTC on March 19. The CME is not expected to arrive at Earth. No other CMEs have been detected in the available coronagraph images.

Krooniauk

SIDC Coronal Hole 93 (equatorial coronal hole with a negative polarity) which started to cross the central meridian on March 19 is still residing on the central meridian. The high-speed stream emanating from this coronal hole is expected to arrive at Earth on March 23.

Päikesetuul

In the past 24 hours solar wind conditions at Earth were under the waning influence of a high-speed stream (HSS). The total interplanetary magnetic ranged from 3 nT to 8 nT, with the Bz component reaching a minimum of -7 nT. The solar wind speed ranged from 427 km/s to 520 km/s. The phi- angle was mainly in the negative sector (directed towards the Sun) with periods in the positive sector. The solar wind conditions are expected to return towards slow solar wind levels over the next 24 hours.

Geomagnetism

The geomagnetic conditions over the past 24 hours reached minor storm conditions globally (Kp 5) and active conditions (K BEL 4). Predominantly quiet to unsettled geomagnetic conditions are expected for the next 24 hours.

Prootoni voo tasemed

Over the past 24 hours, the greater than 10 MeV GOES proton flux was at background levels and is expected to remain so over the next days.

Elektronivoog geostatsionaarsel orbiidil

The greater than 2 MeV electron flux, as measured by GOES-18 satellites, exceeded the 1000 pfu threshold between 18:05 UTC and 23:50 UTC on March 19. The electron flux is expected to remain below the threshold in the coming 24 hours. The 24h electron fluence is presently at normal level, and it is expected to remain so in the next 24 hours.

Tänane hinnanguline rahvusvaheline päikeselaikude arv (ISN): 171, põhineb 19 jaamadel.

Päikese indeksid 19 Mar 2025

Catania Wolfi number	///
10cm päikesevoog	180
AK Chambon La Forêt	023
AK Wingst	018
Hinnanguline Ap	022
Hinnanguline rahvusvaheline päikeselaikude arv	170 - Põhineb 24 jaamal

Märkimisväärsete sündmuste kokkuvõte

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

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