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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2017 May 10 1231 UTC

SIDC Forecast

Brillamenti solari

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
10 May 2017	068	005
11 May 2017	067	009
12 May 2017	065	008

Bulletin

There were no C-class, and even B-class flares, reported in the last 24 hours. We expect that the solar activity will remain at this low level, and we do not expect C-class flares in the coming hours, while isolated B-class flares are still possible but not very probable. No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The solar wind speed is presently about 360 km/s, and the interplanetary magnetic field magnitude (IMF) is 6nT. Due to the crossing of the sector boundary, simultaneously with the sudden change of the phi angle, the IMF increased to the value of 8nT (at about 16:00 UT on May 09). This slightly elevated value of IMF was maintained until shortly before 24:00 UT when it dropped back to the value of about 5nT, again with the sudden change of the phi angle. The geomagnetic conditions are presently quiet to unsettled and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 000, based on 26 stations.

Solar indices for 09 May 2017

Wolf number Catania	011
10cm solar flux	069
AK Chambon La Forêt	011
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

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