Viewing archive of Wednesday, 25 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 25 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
25 Apr 2018	073	010
26 Apr 2018	074	017
27 Apr 2018	074	007

Bulletin

There is one active region on the disc, NOAA AR 2706 with beta magnetic field configuration. No C-class flares in past 24 h, but they remain possible.

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 350 km /s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions are quiet, the fast solar wind related to the southern extension of the northern polar coronal hole can affect the Earth in about 24 h and cause active geomagnetic conditions (although it may pass north of the Earth).

Today's estimated international sunspot number (ISN): 017, based on 22 stations.

Solar indices for 24 Apr 2018

Wolf number Catania	029
10cm solar flux	073
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	020 - Based on 24 stations

Noticeable events summary

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

All times in UTC

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