Viewing archive of Thursday, 29 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 29 1230 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
29 Sep 2016	083	028
30 Sep 2016	080	018
01 Oct 2016	077	011

Bulletin

The only active region observed on the visible side of the Sun, NOAA AR 2597, is presently situated close to the west solar limb. Although it was the source of only B-class flares during last 48 hours, it could be still source of the isolated C-class flare in the coming hours. No Earth directed CMEs were observed in the last 24 hours. Earth is presently inside the fast solar wind with the speed of about 680 km/s. The interplanetary magnetic field magnitude is about 7 nT, and the Bz component of the interplanetary magnetic field is fluctuating between 2 nT and -9 nT. The arrival of the fast solar wind from the large coronal hole in the northern hemisphere has induced major storm conditions, lasting for several hours, in the evening of September 28 (starting at about 19 UT). The local station at Dourbes reported K=6, and NOAA reported Kp=6. We expect disturbed geomagnetic conditions to continue in the coming hours.

Today's estimated international sunspot number (ISN): 016, based on 16 stations.

Solar indices for 28 Sep 2016

Wolf number Catania	041
10cm solar flux	084
AK Chambon La Forêt	///
AK Wingst	040
Estimated Ap	039
Estimated international sunspot number	032 - Based on 26 stations

Noticeable events summary

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

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