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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 Dec 03 1230 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
03 Dec 2019	070	002
04 Dec 2019	069	005
05 Dec 2019	069	004

Bulletin

Solar activity was at very low levels. The visible solar disk was spotless. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at very low levels.

The solar wind speed decreased from around 340 km/s to near 300 km/s by the end of the period (ACE). The interplanetary magnetic field (phi angle) was predominantly directed towards the Sun (negative sector) for the first part of the period but switched to the positive sector from 3 UT. Bz varied between -3 and +5 nT.

Geomagnetic activity was quiet, with the Kp index (NOAA) registering 0 for the whole period and the local k index (Dourbes) recording values of 0-1. Quiet conditions are expected to continue, with a small possibility of an isolated unsettled interval on December 4, due to the influence of the extension from the southern polar coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 17 stations.

Solar indices for 02 Dec 2019

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	000 - Based on 23 stations

Noticeable events summary

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

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