Viewing archive of Thursday, 3 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 03 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
03 Oct 2019	068	009
04 Oct 2019	068	016
05 Oct 2019	067	012

Bulletin

Solar activity was at very low levels. The visible solar disk has returned to spotlessness. No earth-directed coronal mass ejections (CMEs) have been observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind speed varied between mostly 450 and 520 km/s until about 04UT, when it gradually shifted into a less enhanced range between 400 and 450 km/s (ACE). Bz undulated between -4 and +4 nT. The interplanetary magnetic field (phi angle) was predominantly directed away from the Sun (positive sector). Both Kp and K Dourbes recorded quiet to unsettled geomagnetic conditions.

Geomagnetic activity is expected to remain at quiet to unsettled levels until around 4 October, when the wind stream from a patchy negative polarity coronal hole in the southern solar hemisphere may exert some influence on the earth environment. Mostly unsettled conditions are expected, with a chance on an isolated active interval.

Today's estimated international sunspot number (ISN): 000, based on 16 stations.

Solar indices for 02 Oct 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	011
AK Wingst	007
Estimated Ap	008
Estimated international sunspot number	012 - Based on 18 stations

Noticeable events summary

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

All times in UTC

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