Viewing archive of Tuesday, 31 December 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Dec 31 1231 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
31 Dec 2019	072	004
01 Jan 2020	072	014
02 Jan 2020	072	007

Bulletin

The Sun is spotless and did not produce any flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at only 1%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

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

Solar wind speed near Earth as registered by ACE varied between about 275 and 325 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was directed towards the Sun, and its magnitude varied between about 2 and 8 nT. Bz was never below -5 nT. Quiet to mildly enhanced solar wind conditions are expected in the next 24 hours.

Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 2) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on December 31 and on January 1 and 2, with a chance for active intervals (K Dourbes = 4) due to the influence of a weak solar wind stream associated with a negative polarity coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 12 stations.

Solar indices for 30 Dec 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	///
AK Wingst	002
Estimated Ap	002
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

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