Viewing archive of Friday, 13 September 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Sep 13 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
13 Sep 2019	069	008
14 Sep 2019	069	005
15 Sep 2019	070	004

Bulletin

There are no active regions visible on the disk. Solar activity has been very low over the past 24 hours, no significant flares have been recorded. No Earth directed CMEs have been observed in past 24 hours. The greater than 10MeV proton flux remained at background levels over the past 24 hours.

Solar activity is expected to remain low.

The solar wind speed oscillated around 420 km/s for the first part of the period and then from 20:00 UT Sept 12 it showed a gradual increase reaching a maximum of approximately 530 km/s. The interplanetary magnetic field was predominantly directed away from the Sun (positive sector) and gradually increased in magnitude over the period, with values recorded between 1 and 10 nT. The Bz fluctuated between -7 and +8 nT. Geomagnetic conditions have been quiet to unsettled over the past 24 hours, with the Kp index (NOAA) and the local k index (Dourbes) recording values between 1 and 3.

Quiet conditions are expected to continue over the next 48 hours, with isolated unsettled intervals possible.

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

Solar indices for 12 Sep 2019

Wolf number Catania	000
10cm solar flux	069
AK Chambon La Forêt	011
AK Wingst	006
Estimated Ap	006
Estimated international sunspot number	000 - Based on 35 stations

Noticeable events summary

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

All times in UTC

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