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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 May 25 1250 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
25 May 2020	069	009
26 May 2020	069	007
27 May 2020	068	007

Bulletin

Solar flaring activity is low, without C-class or even B-class flares reported during last 24 hours. The only active region (not numbered) presently observed on the visible side of the solar disc continues to decay as it approaches the West solar limb. Two rather faint CMEs were observed yesterday morning, but as they originate from the active region situated close to the East solar limb, as seen by STEREO A, the CMEs are back sided and will not arrive to the Earth. During last 24 hours the solar protons remained at the background level.

The Earth is presently inside the slow solar wind with the speed of about 320 km/s and the interplanetary magnetic field magnitude is 6 nT. The extension of the southern polar coronal hole (up to S25) has crossed central meridian today. The solar wind originating from this coronal hole might reach the Earth late on May 29. The geomagnetic conditions are presently quiet and we expect quiet to possibly unsettled geomagnetic conditions in the coming hours.

Today's estimated international sunspot number (ISN): 000, based on 25 stations.

Solar indices for 24 May 2020

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	010
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 30 stations

Noticeable events summary

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

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