Viewing archive of Tuesday, 25 December 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Dec 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 Dec 2018	070	002
26 Dec 2018	070	003
27 Dec 2018	070	003

Bulletin

Solar activity was at very low levels. The Sun was spotless. No coronal mass ejections (CMEs) were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A narrow extension of the positive polarity northern polar coronal hole (CH) is transiting the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between 315 and 365 km/s (DSCOVR). Bz ranged from -4 to +5 nT, with a negative stretch at -4 nT between 19:30 and 01:30UT. The interplanetary magnetic field remained primarily directed towards the Sun (negative sector). Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 24 Dec 2018

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	010
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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