Viewing archive of Saturday, 12 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 12 1231 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
12 Oct 2019	069	005
13 Oct 2019	069	007
14 Oct 2019	068	007

Bulletin

Solar activity was at very low levels, no significant flares have been recorded. The Sun remained spotless. No earth-directed coronal mass ejections (CMEs) have been observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

The solar wind speed gradually decreased from 500 km/s to 400 km/s (ACE). The total magnetic field varied between 1 and 5 nT. The direction of the interplanetary magnetic field (phi angle) was predominantly directed away from the Sun (positive sector). Bz was mostly negative but weak with values between -4 and +2 nT. Geomagnetic activity was at quiet to unsettled levels, with the Kp index (NOAA) and the local k index (Dourbes) recording values of 1-3 and 0-3, respectively.

Quiet conditions are expected to continue for Oct 12 with isolated active conditions possible Oct 13 and 14, due to the influence of a negative polarity coronal hole which began to traverse the central meridian on Oct 10.

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

Solar indices for 11 Oct 2019

Wolf number Catania	000
10cm solar flux	069
AK Chambon La Forêt	017
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	000 - 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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