Viewing archive of Thursday, 12 September 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Sep 12 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
12 Sep 2019	068	005
13 Sep 2019	068	003
14 Sep 2019	067	005

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. A small eruption was observed on the east limb of the Sun at 18:30 UT on September 11, but it is not expected to affect Earth. 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 gradually decreased over the last 24 hours, recording values between 380 and 450 km/s. The interplanetary magnetic field was predominantly directed away from the Sun (positive sector) and fluctuated between 1 and 5 nT. The Bz fluctuated between -4 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 0-3, respectively.

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 25 stations.

Solar indices for 11 Sep 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	008
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	000 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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