Viewing archive of Thursday, 3 September 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Sep 03 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
03 Sep 2015	088	017
04 Sep 2015	087	007
05 Sep 2015	086	007

Bulletin

Solar activity has been low in past 24 h, only one C-class flare occurred: C1.7 peaking at 11:37 UT from NOAA AR 2407, that rotated behind the west limb already. More C-class flares are possible. Solar wind speeds have been increasing steadily in past 24 h (from 350 to 450 km/s), marking the expected arrival of the fast speed stream from a coronal hole. A sector boundary crossing was detected also at 15:10 UT on September 2. The interplanetary magnetic field intensity is at 7 nT, only unsettled geomagnetic conditions have been recorded. Active to minor storm periods are possible in the coming 24 h considering the increase in solar wind speed continues.

Today's estimated international sunspot number (ISN): 028, based on 14 stations.

Solar indices for 02 Sep 2015

Wolf number Catania	044
10cm solar flux	088
AK Chambon La Forêt	014
AK Wingst	010
Estimated Ap	009
Estimated international sunspot number	038 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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