Viewing archive of Sunday, 26 November 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Nov 26 1233 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
26 Nov 2017	075	006
27 Nov 2017	075	008
28 Nov 2017	075	016

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. A small filament eruption occurred near disk centre at around 04:00 UT on 2017-Nov-25, Coronagraph imagery suggests the bulk of the ejection headed to the East of the Sun-Earth line and only a glancing blow, if any, can be expected. If so, this is anticipated to arrive at Earth late on 2017-Nov-28. However, projection effects make it difficult to ascertain an accurate speed. The greater than 10MeV 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 been been decreasing from 400 to 320 km/s over the past 24 hours. The total magnetic field strength has fluctuated between 0 and 5 nT, peaking around 00:00 UT this morning. The Bz component has fluctuated between positive and negative, between -4 and +5 nT. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and local K index 0-2 (Dourbes) over the past 24 hours. A small transient coronal hole has just passed the central meridian and may enhance solar wind speeds in a couple of days. Geomagnetic conditions are expected to be quiet.

Today's estimated international sunspot number (ISN): 018, based on 17 stations.

Solar indices for 25 Nov 2017

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	005
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	016 - Based on 16 stations

Noticeable events summary

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

All times in UTC

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