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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 May 17 1210 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
17 May 2014	138	009
18 May 2014	135	004
19 May 2014	130	001

Bulletin

Solar activity has been low in the past 24 hours, with only C class flares. One noticeable event, a C3.3 flare, took place in NOAA AR 2066 on May 17, 0229 UT (peak time). There is no clear signature of a CME associated with that event. Two wide CMEs were observed in the past 24 hours. The first one, on May 16, 1424 UT is associated with a backside flare. The second one, on May 17, 0125 UT, is associated with a filament eruption, also on the backside. We expect eruptive conditions in the next 48 hours, with risks of C flares from NOAA ARs 2063 and 2066. Geomagnetic activity has been very low in the past 24 hours. We expect quiet conditions to prevail for the next 48 hours.

Today's estimated international sunspot number (ISN): 107, based on 17 stations.

Solar indices for 16 May 2014

Wolf number Catania	118
10cm solar flux	139
AK Chambon La Forêt	009
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	093 - Based on 27 stations

Noticeable events summary

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

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