Viewing archive of Friday, 27 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 27 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
27 Apr 2018	069	007
28 Apr 2018	067	007
29 Apr 2018	066	007

Bulletin

There is one active region on the disc, NOAA AR 2706 that decayed from beta to alpha magnetic field configuration. No C-class flares in past 24 h and the situation is not expected to change.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 h.

The solar wind speed at L1 is at 390 km /s with interplanetary magnetic field magnitude of 6 nT. Geomagnetic conditions are quiet and expected to remain so. The high speed stream from the southern extension of the northern polar coronal hole can still arrive today (and provoke isolated active geomagnetic conditions), although it may pass north of the Earth without affecting it.

Today's estimated international sunspot number (ISN): 015, based on 13 stations.

Solar indices for 26 Apr 2018

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	014 - Based on 30 stations

Noticeable events summary

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

All times in UTC

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