Viewing archive of Tuesday, 29 August 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Aug 29 1238 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
29 Aug 2017	083	006
30 Aug 2017	084	005
31 Aug 2017	085	040

Bulletin

Over the past 24 hours, the solar activity remained at the low level. The magnetic configuration of Catania group 43 (NOAA region 2672) is still simplifying and has not produced any flare. A region listed as Catania group 47 is rotation from behind the East solar limb, and it shows some activity. It produced several narrow CMEs and one C3-class flare (peak-time at 0:3:00UT, August, 29). This will enhance the activity levels in the coming days.

No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery and the solar protons remains at background level.

The Earth is presently inside the slow solar wind with the speed below 400 km/s, the interplanetary magnetic field magnitude below 10 nT, and the Bz component being mainly negative around -5 nT. The fast solar wind associated with the coronal hole currently facing Earth is expected to arrive on August, 31 around noon UT time.

The geomagnetic conditions are presently very quiet with Kp (NOAA) and local K (Dourbes) indexes ranging between 1-2. The geomagnetic conditions are expected to remain low until August, 31 when the fast solar will reach Earth.

Today's estimated international sunspot number (ISN): 035, based on 25 stations.

Solar indices for 28 Aug 2017

Wolf number Catania	025
10cm solar flux	082
AK Chambon La Forêt	005
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	020 - Based on 34 stations

Noticeable events summary

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

All times in UTC

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