Viewing archive of Wednesday, 31 October 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Oct 31 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
31 Oct 2018	068	007
01 Nov 2018	068	006
02 Nov 2018	068	003

Bulletin

Solar activity was at very low levels. The visible solar disk was devoid of sunspots. No earth-directed coronal mass ejections (CMEs) were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values. A positive polarity equatorial coronal hole has started its transit of the Central Meridian early on 31 October.

Solar activity is expected to remain at very low levels.

Solar wind speed varied mostly between 290 and 320 km/s (DSCOVR). Bz ranged between -5 and +4 nT. The direction of the interplanetary magnetic field (phi angle) was towards the Sun until about 01UT, being variable for the rest of the period. Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue until the arrival of the wind stream associated with the small negative polarity equatorial CH, probably later today. This may result in unsettled geomagnetic conditions.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 30 Oct 2018

Wolf number Catania	000
10cm solar flux	067
AK Chambon La Forêt	005
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 24 stations

Noticeable events summary

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

All times in UTC

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