Просмотр архива за вторник, 26 марта 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2019 Mar 26 1304 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
26 Mar 2019	071	010
27 Mar 2019	071	013
28 Mar 2019	070	008

Bulletin

Solar activity is low with only few B-class flares reported during last 24 hours. Since there are presently no active regions observed on the visible side of the solar disc, we expect that even number of B-class flares will decrease in the coming hours. There were no Earth directed CMEs reported during last 24 hours and the solar protons remained at the background level.

The solar wind speed is presently about 350 km/s and the interplanetary magnetic field magnitude is 7 nT. The fast solar wind associated with the negative polarity equatorial coronal hole (seemingly connected to the southern polar coronal hole), which reached central meridian yesterday afternoon, is expected at the Earth in the morning of March 29. The geomagnetic conditions are presently quiet and we expect quiet to unsettled conditions in the coming hours. The arrival of the fast solar wind, associated with the negative polarity equatorial coronal hole that is expected later today, might induce unsettled to possibly but not very probably, active geomagnetic conditions.

Today's estimated international sunspot number (ISN): 000, based on 26 stations.

Solar indices for 25 Mar 2019

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	009
AK Wingst	006
Estimated Ap	004
Estimated international sunspot number	000 - Based on 33 stations

Noticeable events summary

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

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