Viewing archive of Sunday, 15 September 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Sep 15 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
15 Sep 2019	069	008
16 Sep 2019	069	006
17 Sep 2019	070	011

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 fluctuated between approximately 410 and 490 km/s. The interplanetary magnetic field was predominantly directed away from the Sun (positive sector). The total magnetic field gradually increased over the period, recording values between 3 and 7 nT. The Bz fluctuated between -5 and +4 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 1-3 and 1-2, respectively.

Quiet to unsettled conditions are expected to continue over the next 48 hours, with active conditions possible on the 17th due to the influence of the negative polarity coronal hole, which began to traverse the central meridian on Sept 13.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 14 Sep 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	012
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 32 stations

Noticeable events summary

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

All times in UTC

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