Het archief bekijken van maandag 30 augustus 2021

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2021 Aug 30 1231 UTC

SIDC Prognose

Zonnevlammen

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

Geomagnetisme

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

Proton Flux monitor

Quiet

	10cm flux	Ap
30 Aug 2021	088	019
31 Aug 2021	087	013
01 Sep 2021	086	010

Bulletin

Catania sunspot group 32 (NOAA active region 2860) produced a number of C flares during the period of which the largest a C2.9 flare peaking at 17:30UT. Catania sunspot group 32 (NOAA active region 2860) remains of beta-gamma magnetic type and is expected to be the source of further C flaring with also another M flare from this region possible. The other spotted region on disc, Catania group 33 (NOAA active region 2859), is simple and inactive. Another active region is turning onto the disc in the North-East.

There were no new Earth directed CMEs observed in available coronagraph data.

The greater than 10 MeV proton flux was at background levels and we expect it will remain so in the next 24 hours. The greater than 2 MeV electron flux reached again above the 1000 pfu threshold during its diurnal maximum both yesterday and today. The 24h electron fluence is at moderate levels and we expect it to slowly decay and become normal to moderate.

Solar wind speed increased slightly to now around 400 km/s with a maximum of 440 km/s. The total magnetic field was mainly at nominal levels around 5nT, but saw a period of increased field strength to 11.5nT before midnight. The Bz component of the magnetic field was variable with a downward peak of -7.7nT. The orientation of the magnetic field fluctuated between the toward sector and the away sector. There is no sign yet of the possible arrival of the August 26 CME, but it may be expected to still arrive later today leading to enhanced solar wind conditions in the next 24-48 hours. Afterwards we will be expecting the arrival on September 2 of the August 28 CME.

Geomagnetic conditions were mostly quiet to unsettled (NOAA Kp 1-3) with locally a few active periods before midnight (local K Dourbes 0-4). Geomagnetic conditions are expected to be active with the possible CME arrival later today.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 039, gebaseerd op 15 stations.

Zon indexen voor 29 Aug 2021

Wolfgetal Catania	///
10cm zonneflux	089
AK Chambon La Forêt	016
AK Wingst	010
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	047 - Gebaseerd op 23 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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