Viewing archive of Thursday, 8 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 08 1230 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
08 Sep 2016	092	016
09 Sep 2016	092	008
10 Sep 2016	091	011

Bulletin

NOAA 2585 has a small delta in its main trailing spot and produced several B-class events, the strongest a B8.3 flare peaking at 04:47UT. The two other regions (NOAA 2588 and Catania 28) were quiet. The 40-degrees long filament in the northwest quadrant remained quiet. Currently available coronagraphic imagery revealed no earth-directed coronal mass ejections (CME).

A C-class flare is possible, with a small chance on an isolated M-class event.

Solar wind speed varied mostly between 450 and 510 km/s. Bz fluctuated between -5 and +4 nT. The interplanetary magnetic field (IMF) was predominantly directed away from the Sun (positive). Quiet to unsettled geomagnetic conditions were observed, with an active episode during the 12-15UT interval (Dourbes) and during the 03-06UT interval (Kp).

Quiet to unsettled geomagnetic conditions are expected, with still an active episode possible. There's a small chance that high speed streams from two polar coronal hole extensions (one at +30 degrees and another at -35 degrees) may influence the earth environment from 11 September onwards.

Today's estimated international sunspot number (ISN): 051, based on 22 stations.

Solar indices for 07 Sep 2016

Wolf number Catania	091
10cm solar flux	093
AK Chambon La Forêt	020
AK Wingst	014
Estimated Ap	015
Estimated international sunspot number	061 - Based on 34 stations

Noticeable events summary

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

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