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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Jan 20 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
20 Jan 2018	071	018
21 Jan 2018	071	012
22 Jan 2018	072	010

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar activity is expected to remain low over the next 24 hours with a small chance of C-class flares. The solar wind speed has increased from around 350 to around 400 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 7 nT. The Bz component has ranged between -9 and +6 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. The increased solar wind speeds are the result of a High Speed Stream (HSS) produced by a small coronal hole that passed the central meridian a couple of days ago, the HSS combined with elevated negative Bz may enhance geomagnetic activity over the next day.

Today's estimated international sunspot number (ISN): 000, based on 05 stations.

Solar indices for 19 Jan 2018

Wolf number Catania	014
10cm solar flux	071
AK Chambon La Forêt	019
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	007 - Based on 27 stations

Noticeable events summary

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

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