Просмотр архива за суббота, 18 апреля 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2020 Apr 18 1231 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
18 Apr 2020	068	007
19 Apr 2020	068	004
20 Apr 2020	069	013

Bulletin

There were no sunspot regions on the visible solar disk. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal values and are expected to remain so.

No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery.

Solar wind speed undulated between 290 and 350 km/s (DSCOVR). Bz varied between -6 and +3 nT. The direction of the interplanetary magnetic field (phi angle) was in a mostly sunward orientation (negative sector).

Geomagnetic activity was at quiet levels. Geomagnetic conditions are expected to be quiet to unsettled, with an active interval possible on 20 April in response to the expected wind stream associated with the extension of the negative polarity southern polar coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 17 Apr 2020

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

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