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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 Oct 20 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

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

Sluneční protony

Quiet

	10cm flux	Ap
20 Oct 2018	070	010
21 Oct 2018	070	003
22 Oct 2018	070	001

Bulletin

There are no active regions visible on the solar disk. No C-class flares in past 24 h. Solar activity is expected to remain at low levels.

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 is at 310 km/s with interplanetary magnetic fields of 3 nT. Geomagnetic conditions have been quiet. The fast solar wind associated with the low latitudinal extension of the northern polar coronal hole (positive polarity) may arrive today, causing active geomagnetic conditions. Nevertheless, due to its latitude, the high speed stream may pass north of the Earth and leave it unaffected (quiet conditions expected in that case).

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

Solar indices for 19 Oct 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	005
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

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