Viewing archive of Friday, 18 May 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 May 18 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
18 May 2018	069	008
19 May 2018	069	007
20 May 2018	069	007

Bulletin

No active regions on the visible solar disc. 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 430 km /s with interplanetary magnetic field magnitude of 5 nT. The effect of the coronal hole related solar wind was very weak, with speeds no larger than 450 km/s (and magnetic fields of 10 nT), it caused only unsettled geomagnetic conditions. Quiet to unsettled conditions expected for the next 48 h.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 17 May 2018

Wolf number Catania	000
10cm solar flux	069
AK Chambon La Forêt	015
AK Wingst	013
Estimated Ap	012
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

All times in UTC

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