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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2023 Aug 31 1231 UTC

SIDC Předpověď

Sluneční erupce

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

Geomagnetismus

Active conditions expected (A>=20 or K=4)

Sluneční protony

Quiet

	10cm tok	Ap
31 Aug 2023	142	010
01 Sep 2023	140	015
02 Sep 2023	140	015

Slunečně aktivní oblasti a vzplanutí

The solar flaring activity was at low levels, with few C-class flares recorded in the past 24 hours. The largest flare was an C3.0 flare, peaking at 23:28 on Aug 30, associated with the NOAA AR 3413 (beta class). Low flaring activity was also produced by NOAA AR 3415 (beta class). 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 at low levels over the next 24 hours with C-class flares likely and M-class flares possible.

Vyhazování koronální hmoty

Coronal Mass Ejection (CME) was observed in SOHO/LASCO-C2 at around 17:48 UTC on Aug 29. The CME is believed to originate from a region of coronal dimming located near N05W35. The CME is directed to the north-west and the bulk of the CME is not expected to be Earth directed. However, a glancing blow at Earth may be possible. A partial halo coronal mass ejection (CME) was first observed in the LASCO/C2 chronograph imagery at 22:12 UTC on Aug 30. The CME is associated to a filament eruption near the disk center and a GOES C1.4 flare, peak time 21:26 UTC on Aug 30. Based on the source location and SDO/AIA 304 images the eruption is likely to have an Earth-directed component and impact on Earth. Full analysis is ongoing and more details will be provided later. There were no other Earth-directed CMEs detected in the available coronagraph observations in the last 24 hours.

Solární bouře

Over the past 24 hours, the solar wind parameters reflected slow solar wind conditions. The solar wind speed ranged between 290 - 340 km/s. The interplanetary magnetic field magnitude was below 6 nT. The southward component of the interplanetary magnetic field fluctuated between -5 nT and 6 nT. Today, since about 08:00 UTC on Aug 30, the total interplanetary magnetic field rose to 11 nT. This might be associated with arrival of the compression region in front of the expected HSS from a positive polarity coronal hole or with an ICME, more information will be given as more data becomes available. The solar wind parameters are expected to be slightly elevated during the next days due to the arrival of a high-speed stream from a positive polarity coronal hole, that transited the central meridian on Aug 29.

Geomagnetismus

The geomagnetic conditions over the past 24 hours were quiet. Geomagnetic conditions are expected to be at quiet to unsettled levels, with possible isolated active periods in response to the expected high- speed stream arrival associated with the coronal hole (positive polarity) that transited the central meridian on Aug 29.

Úrovně protonového toku

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

Elektronové toky na geostacionární oběžné dráze

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the 1000 pfu threshold and is expected to remain below this threshold for the next days.The 24h electron fluence was at normal level. The electron fluence is expected to be at normal levels in the next days.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 091, na základě 23 stanic.

Solární indexy za 30 Aug 2023

Wolfovo číslo Catania	107
10cm sluneční tok	139
AK Chambon La Forêt	008
AK Wingst	006
Odhadovaný Ap	006
Odhadovaný mezinárodní počet slunečních skvrn	107 - Na základě 23 stanic

Souhrn významných událostí

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

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