Viewing archive of Tuesday, 24 April 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Apr 24 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
24 Apr 2018	074	007
25 Apr 2018	074	010
26 Apr 2018	073	017

Bulletin

There are two active regions on the disc, NOAA AR 2706 and 2707. No C-class flares in past 24 h, NOAA AR 2706 has a beta magnetic field configuration and is capable of C-class flaring.

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

The solar wind speed at L1 is at 390 km /s with interplanetary magnetic field magnitude of 4 nT. Geomagnetic conditions are quiet and expected to remain so for the next 48h. By then, the fast solar wind related to the southern extension of the northern polar coronal hole can affect the Earth and cause active geomagnetic conditions (although it may pass north of the Earth).

Today's estimated international sunspot number (ISN): 021, based on 13 stations.

Solar indices for 23 Apr 2018

Wolf number Catania	023
10cm solar flux	074
AK Chambon La Forêt	///
AK Wingst	009
Estimated Ap	006
Estimated international sunspot number	022 - 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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