Просмотр архива за четверг, 27 февраля 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2020 Feb 27 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
27 Feb 2020	071	010
28 Feb 2020	071	006
29 Feb 2020	071	004

Bulletin

Solar activity was at very low levels. The Sun is still spotless, but this may change as two small active regions at resp. latitudes S10 and N25 are about to rotate over the east limb as seen in SDO/AIA and STEREO-A/EUVI imagery. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values. Some small and patchy equatorial coronal holes (CHs) are present on the solar disk.

Solar activity is expected to remain at very low levels.

Solar wind conditions were at background levels. Solar wind speed varied steadily between 330 and 370 km/s (ACE). Bz undulated between -5 and +5 nT. The direction of the interplanetary magnetic field (phi angle) was variable. Geomagnetic conditions were at quiet levels, with an unsettled episode (09-12UT) recorded at Dourbes.

Geomagnetic activity is expected to remain mostly at quiet levels, with an isolated unsettled interval remaining possible.

Today's estimated international sunspot number (ISN): 000, based on 13 stations.

Solar indices for 26 Feb 2020

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	009
AK Wingst	005
Estimated Ap	003
Estimated international sunspot number	000 - Based on 24 stations

Noticeable events summary

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

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