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Denní bulletin o sluneční a geomagnetické aktivitě ze SIDC

Vydáno: 2020 Nov 18 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
18 Nov 2020	079	004
19 Nov 2020	079	005
20 Nov 2020	078	007

Bulletin

Solar activity was at very low levels. NOAA 2782 remained an inactive plage region. A new active region NOAA 2783 rotated from the East limb yesterday. It was classified as Hsx/alpha and did not produce any significant flaring activity in the last 24 hours. The solar activity is expected to remain very low with slight changes for a C class flare. No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph imagery.

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 remained under the 1000 pfu threshold and is expected to remain so. The 24h electron fluence was at nominal levels and is expected to remain so for the next 48 hours.

Solar wind speed remained very slow with highest value below 330 km/s (ACE and DSCOVR). The total magnetic field was very weak with a maximal strength of 6.2 nT. The Bz component varied between -5.7 nT and +3.7 nT and the interplanetary magnetic field as measured by the phi angle was predominantly in the positive sector, directed away from the Sun.

Geomagnetic activity was quiet and is expected to remain so within the next 48 hours. On Nov 20th in the afternoon some influence form a high-speed stream related to the small coronal hole observed yesterday (CH 97) might lead to unsettled or possibly isolated active conditions. Another positive- polarity coronal hole (CH 96) was observed close to the central meridian today. The high-speed stream from it might further induce prolonged active conditions starting from Nov. 21th.

Dnešní odhadovaný mezinárodní počet slunečních skvrn (ISN): 010, na základě 16 stanic.

Solární indexy za 17 Nov 2020

Wolfovo číslo Catania	///
10cm sluneční tok	079
AK Chambon La Forêt	005
AK Wingst	002
Odhadovaný Ap	002
Odhadovaný mezinárodní počet slunečních skvrn	010 - Na základě 17 stanic

Souhrn významných událostí

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