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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 Feb 20 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

	10cm flux	Ap
20 Feb 2016	095	012
21 Feb 2016	096	007
22 Feb 2016	097	018

Bulletin

In the past 24 hours, two low C flares were released by returning region NOAA AR 2490 behind the southeastern limb. The brightest flare was a C2.7 flare which peaked at 23:10 UT on February 19. C flares (probability 70%) are expected within the next 24 hours, with a chance for an M flare (probability 20%), especially from returning region 2490. In the past 24 hours, the solar wind speed measured by ACE gradually decreased from about 560 km/s to 490 km/s. The magnitude of the Interplanetary Magnetic Field ranged between 1 and 6 nT. Over the past 24 hours, quiet to active geomagnetic levels were registered (K Dourbes between 1 and 4; NOAA Kp between 2 and 3). Quiet to active levels (K Dourbes < 5) are expected on February 20, and quiet to unsettled levels (K Dourbes < 4) on February 21 and 22.

Today's estimated international sunspot number (ISN): 052, based on 07 stations.

Solar indices for 19 Feb 2016

Wolf number Catania	039
10cm solar flux	094
AK Chambon La Forêt	027
AK Wingst	019
Estimated Ap	019
Estimated international sunspot number	048 - Based on 21 stations

Noticeable events summary

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

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