Viewing archive of Sunday, 21 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 21 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
21 Jan 2018	071	011
22 Jan 2018	071	007
23 Jan 2018	071	006

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 fluctuated between 400 and 450 km/s over the past 24 hours. The total magnetic field strength has increased from around 6 nT to 11 nT. The Bz component has ranged between -5 and +11 nT. Geomagnetic conditions ranged between Kp index 1-2 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. The slightly 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 few 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 11 stations.

Solar indices for 20 Jan 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	009
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	000 - Based on 10 stations

Noticeable events summary

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

All times in UTC

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