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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 May 20 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
20 May 2018	069	007
21 May 2018	069	007
22 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 400 km /s with interplanetary magnetic field magnitude of 5 nT. Geomagnetic conditions have been quiet and are expected to remain so. On May 23, the high speed solar wind from the positive polarity extension of the northern polar coronal hole may arrive to the Earth and cause disturbed geomagnetic conditions (although it might pass north of the Earth without affecting it).

Today's estimated international sunspot number (ISN): 000, based on 22 stations.

Solar indices for 19 May 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	007
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

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