Viewing archive of Wednesday, 7 September 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Sep 07 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
07 Sep 2016	094	015
08 Sep 2016	095	008
09 Sep 2016	095	009

Bulletin

NOAA 2585 developed a small delta in its main trailing spot and produced a B6.6 flare peaking at 10:40UT, the strongest flare of the period. NOAA 2588 and a new region near the west limb (Catania 25) produced a minor B-class event each. The 40-degrees long filament in the northwest quadrant remained quiet. No earth-directed coronal mass ejections (CME) were observed.

C-class flares are possible, with a chance on an isolated M-class event.

Solar wind speed continued its gradual decline from about 520 km/s to its current value near 470 km/s. Bz fluctuated between -5 and +4 nT. The interplanetary magnetic field (IMF) was mostly directed away from the Sun (positive). Quiet to unsettled geomagnetic conditions were observed, with an isolated active episode during the 18-21UT interval.

Quiet to unsettled geomagnetic conditions are expected, with a chance on an active episode in response to the waning effects of the coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 061, based on 27 stations.

Solar indices for 06 Sep 2016

Wolf number Catania	050
10cm solar flux	092
AK Chambon La Forêt	026
AK Wingst	019
Estimated Ap	019
Estimated international sunspot number	040 - Based on 26 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page