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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Aug 19 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Protoni solari

Quiet

	10cm flux	Ap
19 Aug 2016	082	005
20 Aug 2016	081	017
21 Aug 2016	079	006

Bulletin

Solar activity was very low in the past 24 hours. Only one B1.3 flare was observed yesterday 18-Aug-2016 (peaking at 14:14 UT). Three additional active regions are presently observed on the visible side of the solar disc. Their photospheric magnetic field configuration is simple (beta and alpha configuration). No Earth-directed CMEs were observed. Solar proton flux intensity is expected to lie within the background levels. Solar activity is expected to be low with small probability for C-class flares. Solar wind speed measured by DSCOVR varied between 390 and 350 km/s, while the magnitude of the Interplanetary Magnetic Field (Bt) fluctuated between 4 and 6 nT. Geomagnetic conditions have been quiet in the past 24 hours (K Dourbes between 1 and 3; NOAA Kp between 1 and 2). Geomagnetic activity is expected to continue at very low levels today (19-08-2016). Active to minor geomagnetic storm conditions (K Dourbes = 3-4) are possible from 20-Aug-2016 due to the expected arrival of a high speed stream associated with a coronal hole.

Today's estimated international sunspot number (ISN): 051, based on 19 stations.

Solar indices for 18 Aug 2016

Wolf number Catania	///
10cm solar flux	082
AK Chambon La Forêt	009
AK Wingst	010
Estimated Ap	008
Estimated international sunspot number	048 - Based on 31 stations

Noticeable events summary

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

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