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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2018 Oct 02 1230 UTC

SIDC Forecast

Sluneční erupce

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
02 Oct 2018	070	007
03 Oct 2018	069	010
04 Oct 2018	068	010

Bulletin

One active region visible on the solar disc, NOAA 2723 with beta magnetic field configuration. 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 480 km/s with interplanetary magnetic fields of 5 nT. Geomagnetic conditions reached active levels between 15:00 UT and 17:00 UT on October 1 at Dourbes (K=4), at planetary levels Kp reached 4 between 12:00 UT and 15:00 UT on October 1 and between 00:00 UT and 03:00 UT on October 2. This was due to solar wind of relatively high speed (reaching 530 km/s) with interplanetary magnetic fields up to 10 nT with oscillating periods including negative Bz. Quiet to unsettled conditions for the coming hours are foreseen. The fast solar wind associated with a small negative polarity equatorial coronal hole is expected to arrive on October 4 (or late on October 3), causing up to active geomagnetic conditions.

Today's estimated international sunspot number (ISN): 014, based on 14 stations.

Solar indices for 01 Oct 2018

Wolf number Catania	017
10cm solar flux	070
AK Chambon La Forêt	021
AK Wingst	012
Estimated Ap	011
Estimated international sunspot number	017 - Based on 25 stations

Noticeable events summary

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

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