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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Aug 03 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
03 Aug 2016	076	032
04 Aug 2016	076	021
05 Aug 2016	076	007

Bulletin

Solar activity was very low. No C flares or halo CMEs were observed. Solar activity is expected to remain very low (no C flaring) for the next 24 hours. Solar wind speed measured by DSCOVR suddenly increased from about 355 to 385 km/s around 12h UT on August 2, and gradually further to a maximum of about 460 km/s, after the solar wind density and the magnitude of the Interplanetary Magnetic Field had been rising since about 4h UT to a maximum of about 40 particles per cc and 25 nT, respectively. These phenomena are most probably due to the arrival of a predicted high speed stream associated with a positive coronal hole. In combination with Bz values of down to -20 nT, this resulted in active periods for K Dourbes and even minor geomagnetic storm periods for NOAA Kp between 21h UT on August 2 and 9h UT on August 3. Further active to minor geomagnetic storm periods (K Dourbes = 4-5) are possible on August 3. Active conditions are possible on August 4, and a return to quiet to unsettled geomagnetic conditions is expected on August 5.

Today's estimated international sunspot number (ISN): 000, based on 14 stations.

Solar indices for 02 Aug 2016

Wolf number Catania	///
10cm solar flux	075
AK Chambon La Forêt	044
AK Wingst	021
Estimated Ap	021
Estimated international sunspot number	013 - Based on 16 stations

Noticeable events summary

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

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