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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2024 Feb 21 1231 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm tok	Ap
21 Feb 2024	150	008
22 Feb 2024	148	010
23 Feb 2024	146	010

Slunečně aktivní oblasti a vzplanutí

Solar flaring activity over the past 24 hours was at low levels. The largest flare was a C4.4-flare, with peak time 02:17 UTC on February 21, associated with a yet unnumbered active region behind the east-limb on the southern hemisphere of the Sun. There are currently 3 numbered active regions on the visible disk. NOAA AR 3590 (beta-gamma) is the largest and most magnetically complex region but has only produced minor C-class flares in the last 24 hours. NOAA AR 3586 (beta) has been stable and inactive. NOAA AR 3584 has decreased in size and is rotating over the west limb. The solar flaring activity is likely to be at low levels over the coming days with C-class flares expected and M-class flares possible.

Vyhazování koronální hmoty

No Earth directed Coronal Mass Ejections (CME)s, have been observed in the last 24 hours. Further analysis of the CME seen in LASCO C2 data one at 23:24 UTC on February 19, shows it is not expected to impact the Earth.

Solární bouře

Slow solar wind conditions were recorded over the past 24 hours. The solar wind speed as measured by ACE, gently declined from around 460 km/s to around 270 km/s. The interplanetary magnetic field fluctuated between 2 nT and 9 nT, with the Bz reaching a minimum value of -6 nT. The phi-angle was in the positive sector (directed away the Sun) with periods on the negative sector. In the next 24-hours slow solar wind conditions are expected.

Geomagnetismus

Geomagnetic conditions were globally and locally quiet (Kp 3 and K Bel 3) with some unsettled periods over the past 24 hours.

Úrovně protonového toku

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

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the upcoming days. The 24h electron fluence was at nominal level and is expected to remain so in the next days.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 050, na základě 11 stanic.

Solární indexy za 20 Feb 2024

Wolfovo číslo Catania	///
10cm sluneční tok	153
AK Chambon La Forêt	012
AK Wingst	007
Odhadovaný Ap	006
Odhadovaný mezinárodní počet slunečních skvrn	049 - Na základě 24 stanic

Souhrn významných událostí

Poskytuje Centrum pro analýzu dat o solárních vlivech© - SIDC - Zpracováno SpaceWeatherLive

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