Viewing archive of Saturday, 28 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 28 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 28 Apr 2018 until 30 Apr 2018
Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

10cm fluxAp
28 Apr 2018069007
29 Apr 2018068007
30 Apr 2018067007

Bulletin

There is one active region on the disc, NOAA AR 2706 with 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 380 km /s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions are quiet and expected to remain so.

Today's estimated international sunspot number (ISN): 000, based on 18 stations.

Solar indices for 27 Apr 2018

Wolf number Catania///
10cm solar flux069
AK Chambon La Forêt010
AK Wingst006
Estimated Ap006
Estimated international sunspot number014 - Based on 19 stations

Noticeable events summary

DayBeginMaxEndLocStrengthOP10cmCatania/NOAARadio burst types
None

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

All times in UTC

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