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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 May 10 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
10 May 2018	069	015
11 May 2018	069	007
12 May 2018	069	003

Bulletin

Solar activity was at very low levels. Small and inactive region NOAA 2709 (Catania 81) is currently the only visible sunspot region on the solar disk. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Earth remained under the influence of the high speed stream (HSS) from an elongated negative polarity equatorial coronal hole (CH). Solar wind speed varied mostly between 560 and 610 km/s, with a short-lived peak near 670 km/s around 18UT (DSCOVR). Bz varied between -5 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun. Geomagnetic activity ranged from quiet to active levels.

Quiet to unsettled geomagnetic conditions are expected, with a chance on an isolated active interval.

Today's estimated international sunspot number (ISN): 011, based on 20 stations.

Solar indices for 09 May 2018

Wolf number Catania	025
10cm solar flux	070
AK Chambon La Forêt	025
AK Wingst	019
Estimated Ap	020
Estimated international sunspot number	021 - Based on 33 stations

Noticeable events summary

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

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