Viewing archive of Wednesday, 9 October 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Oct 09 1236 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
09 Oct 2019	067	013
10 Oct 2019	067	008
11 Oct 2019	068	004

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 fluctuated around 385 km/s for most of the period and then began increasing, from 6 UT October 9, reaching up to 430 km/s (ACE). The total magnetic field fluctuated between 0 and 5 nT and then from 6 UT gradually increased to values up to 9 nT. Bz was mostly negative and varied between -7 and +3 nT.

Geomagnetic activity was quiet to unsettled for the first part of the period, following which active conditions were observed (Kp and local k index Dourbes = 4) between 9 and 12 UT October 9 due to an extended period of strong negative Bz.

Unsettled conditions are expected to continue with isolated active periods possible over the next 24 hours in response to further enhancements in the solar wind.

Today's estimated international sunspot number (ISN): 000, based on 09 stations.

Solar indices for 08 Oct 2019

Wolf number Catania	000
10cm solar flux	067
AK Chambon La Forêt	013
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	000 - Based on 22 stations

Noticeable events summary

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

All times in UTC

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