Viewing archive of Saturday, 25 November 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Nov 25 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
25 Nov 2017	075	011
26 Nov 2017	074	008
27 Nov 2017	074	008

Bulletin

Over the past 24 hours solar activity has been quiet. No significant flares have been recorded. All Active Regions (AR) have shown low levels of activity. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10 MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind speed fluctuated between 350 and 450 km/s over the past 24 hours, peaking around 00:00 UT this morning. The total magnetic field strength has fluctuated between 3 and 10 nT, peaking around 00:00 UT this morning. The Bz component has fluctuated between -6 and +8 nT. Geomagnetic conditions ranged between Kp index 0-4 (NOAA) and local K index 0-5 (Dourbes) over the past 24 hours. The enhanced solar wind speed and negative Bz this morning resulted in a peak in geo-magnetic conditions (K=5). A small transient coronal hole has just passed the central meridian and will enhance solar wind speeds in a couple of days. Geomagnetic conditions are expected to be quiet to unsettled.

Today's estimated international sunspot number (ISN): 016, based on 11 stations.

Solar indices for 24 Nov 2017

Wolf number Catania	000
10cm solar flux	074
AK Chambon La Forêt	025
AK Wingst	014
Estimated Ap	013
Estimated international sunspot number	000 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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