Viewing archive of Thursday, 18 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 18 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
18 Jan 2018	071	004
19 Jan 2018	071	010
20 Jan 2018	071	016

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. Active Region (AR) 2696 (Mcintosh class:Bxo; Mag. type:Beta) is the only region on the disk, producing a B9.7 class flare. Flaring activity from the region has been increasing. There are no other significant ARs on the solar disk. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar activity is expected to remain low over the next 24 hours with a chance of C-class flares. The solar wind speed has fluctuated around 350 km/s over the past 24 hours. The total magnetic field strength has remained around 5 nT. The Bz component has been mainly positive ranging between -1 and +5 nT. Geomagnetic conditions ranged between Kp index 0-1 (NOAA) and local K index 0-1 (Dourbes) over the past 24 hours. Geomagnetic conditions are expected to be quiet, however a coronal hole is currently passing disk centre and may increase geomagnetic activity in 2-3 days.

Today's estimated international sunspot number (ISN): 014, based on 12 stations.

Solar indices for 17 Jan 2018

Wolf number Catania	020
10cm solar flux	071
AK Chambon La Forêt	006
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	017 - Based on 19 stations

Noticeable events summary

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

All times in UTC

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