Просмотр архива за среда, 19 августа 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2020 Aug 19 1235 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Солнечные протоны

Quiet

	10cm flux	Ap
19 Aug 2020	071	017
20 Aug 2020	071	020
21 Aug 2020	071	005

Bulletin

The solar activity was low over the past 24 hours. N0AA-AR 2772 (N18W37, Bxo/Beta) was associated with a sunspot and named. The X-ray flux was low and reached B-class level. A region is about to rotate on the visible side of the disk. For the next 24 hours the solar activity is expected to remain low.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraphic imagery.

The greater than 10 MeV proton flux was at background levels over the past 24 hours. It is expected to stay at background levels for the next 24 hours. The greater than 2 MeV electron flux was at nominal levels over the past 24 hours and is expected to remain so over the next 24 hours.

The solar wind speed near Earth had an average of 350 km/s (DSCOVR). The polarity of the Interplanetary Magnetic Field (IMF) was predominantly oriented away the Sun (phi angle in the positive sector). Bz fluctuated between -9 and +5 nT. The magnitude of the magnetic field varied between 2 and 11 nT. A negative polarity Coronal Hole (CH) is crossing Central Meridian (CM). Its high speed stream could be expected for Aug 21. Over the next 24 hours, the combined effects of the wind associated with the CME on Aug 16 and the CH at CM on Aug 17 can be anticipated to have an impact.

The geomagnetic conditions were quiet to unsettled. The values registered for the past 24 hours were 0-3 for K Dourbes and 1-3 for NOAA Kp. Unsettled to active conditions, with a chance of a minor storm, are expected for the next 24 hours.

Today's estimated international sunspot number (ISN): 014, based on 21 stations.

Solar indices for 18 Aug 2020

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	016
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	013 - Based on 31 stations

Noticeable events summary

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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