Viewing archive of Friday, 11 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 11 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
11 Oct 2019	068	006
12 Oct 2019	067	005
13 Oct 2019	067	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 has remained slightly elevated with values fluctuating around 480 km/s (ACE). The total magnetic field varied between 1 and 6 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 -5 and +3 nT. Geomagnetic activity was quiet to unsettled for most of the period, with an isolated active interval at 17:00 UT Oct 10, as measured by the local K-index at Dourbes.

Quiet to unsettled conditions are expected to continue for Oct 11-12 with isolated active conditions possible on Oct 13, 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 12 stations.

Solar indices for 10 Oct 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	018
AK Wingst	014
Estimated Ap	015
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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