Viewing archive of Thursday, 5 September 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Sep 05 1231 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
05 Sep 2019	069	015
06 Sep 2019	069	007
07 Sep 2019	069	013

Bulletin

No active regions visible on the disk. Solar activity has been very low, no flares in the past 24 h. The situation is not expected to change in the next 48 h.

No Earth directed CMEs in past 24 h. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 520 km/s with interplanetary magnetic field magnitude of 3 nT. Geomagnetic conditions ranged between 2 and 4 (both for Kp and K Dourbes). The active periods observed early today were due to slightly high speed solar wind (~550 km/s) with negative Bz (up to -5 nT), lasting for several hours. The fast solar wind stream associated with a negative polarity coronal hole is expected to arrive to the Earth on September 7. Quiet to unsettled geomagnetic conditions expected until then.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 04 Sep 2019

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	024
AK Wingst	016
Estimated Ap	014
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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