Viewing archive of Saturday, 22 December 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Dec 22 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
22 Dec 2018	071	002
23 Dec 2018	071	005
24 Dec 2018	071	006

Bulletin

The Sun is currently spotless and did not produce any B class flares or higher over the past 24 hours. The chance for a C flare in the next 24 hours is estimated low. No Earth-directed CMEs were detected in available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours, and is expected to stay at nominal levels for the next 24 hours.

The solar wind speed near Earth as registered by DSCOVR gradually decreased from about 500 to 400 km/s over the past 24 hours, following the influence of a solar wind stream associated with an isolated negative polarity coronal hole. The Interplanetary Magnetic Field (IMF) fluctuated between 2 and 5 nT. Bz varied between 3 and -3 nT.

Quiet to unsettled geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 1) were registered in the past 24 hours. Quiet geomagnetic levels are expected over the next 24 hours.

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

Solar indices for 21 Dec 2018

Wolf number Catania	000
10cm solar flux	071
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	004
Estimated international sunspot number	000 - Based on 15 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page