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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Apr 15 1230 UTC

SIDC Forecast

Brillamenti solari

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
15 Apr 2016	113	006
16 Apr 2016	113	007
17 Apr 2016	113	007

Bulletin

Beta region NOAA AR 2529 released two C flares in the past 24 hours. The brightest one was a C1.8 flare which peaked at 13:32 UT on April 14. More C flares (probability 65%) are expected in the next 24 hours, with a slight chance (probability 10%) for an M flare, especially from AR 2529. Over the past 24 hours, solar wind speed decreased from about 450 to 360 km/s and increased again to about 380 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) decreased from 9 to 5 nT and increased again to about 8 nT. Over the past 24 hours, geomagnetic conditions have been quiet to minor storm (K Dourbes between 1 and 5; NOAA Kp between 1 and 4). K Dourbes values of 5 were registered on 17h and 18h UT on April 14, as a result of elevated solar wind and IMF values in combination with a predominantly southward direction of Bz. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on April 15, 16 and 17.

Today's estimated international sunspot number (ISN): 051, based on 18 stations.

Solar indices for 14 Apr 2016

Wolf number Catania	074
10cm solar flux	111
AK Chambon La Forêt	038
AK Wingst	023
Estimated Ap	024
Estimated international sunspot number	048 - Based on 28 stations

Noticeable events summary

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

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