Viewing archive of Sunday, 22 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 22 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
22 Apr 2018	076	006
23 Apr 2018	074	008
24 Apr 2018	073	006

Bulletin

There are presently two numbered sunspot groups on the visible side of the Sun (NOAA ARs 2706 and 2707). During last 24 hours solar flaring activity was at the low B-class level. We expect such a level of activity to persist in the coming hours, an isolated C-class flares are also possible but not very probable. There were no wide and Earth directed CMEs observed in the coronagraph images. The solar protons were at the background level.

The solar wind speed decreased and it presently amounts about 500 km/s. The interplanetary magnetic field magnitude is stable, amounting about 6 nT during last 36 hours. The geomagnetic conditions are presently quiet and we expect quiet to unsettled geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 021, based on 23 stations.

Solar indices for 21 Apr 2018

Wolf number Catania	///
10cm solar flux	077
AK Chambon La Forêt	018
AK Wingst	015
Estimated Ap	015
Estimated international sunspot number	025 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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