Viewing archive of Thursday, 4 October 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Oct 04 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
04 Oct 2018	068	006
05 Oct 2018	067	007
06 Oct 2018	066	007

Bulletin

The active region visible on the solar disc, NOAA 2723 with beta magnetic field configuration, is slowly decaying. No C-class flares in past 24 h. Solar activity is expected to remain at low levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 410 km/s with interplanetary magnetic fields of 5 nT. Geomagnetic conditions have been quiet to unsettled. The fast solar wind associated with a small negative polarity equatorial coronal hole influenced the Earth overnight, but caused only unsettled conditions (Kp = 3 and K at Dourbes = 3) with speeds slightly above 500 km/s and interplanetary magnetic field reaching 10 nT. Quiet conditions expected for the next 48 h. The fast solar wind associated with a positive polarity coronal hole will arrive to the Earth on October 7-8, causing disturbed geomagnetic conditions.

Today's estimated international sunspot number (ISN): 011, based on 15 stations.

Solar indices for 03 Oct 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	012
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	013 - Based on 30 stations

Noticeable events summary

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

All times in UTC

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