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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 Nov 23 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
23 Nov 2015	125	006
24 Nov 2015	127	007
25 Nov 2015	129	019

Bulletin

Beta-gamma region NOAA AR 2454 produced seven C flares during the past 24 hours. The brightest flare peaked around 2:28 UT on November 23 at C8.7 level. C flares are expected within the next 24 hours, with a 30% chance for an M flare, especially from AR 2454. A CME associated with a filament eruption in the Southwest was first observed by LASCO C2 around 9:12 UT on November 22. Imagery from LASCO C2 and C3 and COR2A suggests that this CME is not Earthbound. The Earth is currently within a slow solar wind regime. Solar wind speed varied between 320 and 360 km/s in the past 24 hours, while the magnitude of the Interplanetary Magnetic Field first ranged between 1 and 5 nT. Over the past 24 hours, geomagnetic conditions have been quiet to unsettled (K Dourbes between 0 and 3; NOAA Kp between 0 and 1). Quiet to unsettled geomagnetic conditions (K Dourbes < 4) are expected on November 23 and 24. The expected arrival of a coronal hole high speed stream may cause active (K Dourbes = 4) geomagnetic levels on November 25, with a slight chance for a minor storm (K Dourbes = 5).

Today's estimated international sunspot number (ISN): 054, based on 21 stations.

Solar indices for 22 Nov 2015

Wolf number Catania	///
10cm solar flux	123
AK Chambon La Forêt	004
AK Wingst	002
Estimated Ap	001
Estimated international sunspot number	072 - Based on 21 stations

Noticeable events summary

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

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