Viewing archive of Saturday, 28 July 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jul 28 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
28 Jul 2018	067	005
29 Jul 2018	067	007
30 Jul 2018	067	007

Bulletin

The Sun is spotless and produced only a few A flares in the past 24 hours, from a new region that is approaching the East limb. The chance for a C flare in the next 24 hours is estimated at 5%.

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 as registered by DSCOVR further decreased from about 430 to 370 km/s. The Interplanetary Magnetic Field (IMF) was oriented towards the Sun and its magnitude varied between about 1 and 6 nT. Bz was never below -5 nT. The solar wind is expected to stay at nominal levels in the next days.

Quiet geomagnetic conditions (K Dourbes between 1 and 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Quiet to unsettled conditions (K Dourbes < 4) are expected on July 28, 29 and 30.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 27 Jul 2018

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	009
AK Wingst	004
Estimated Ap	005
Estimated international sunspot number	000 - Based on 38 stations

Noticeable events summary

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

All times in UTC

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