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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 May 18 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
18 May 2020	070	007
19 May 2020	071	008
20 May 2020	071	003

Bulletin

Solar flaring activity was at very low levels. No significant flares have been recorded. Solar activity is expected to remain at very low levels.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to stay at nominal levels for the next 24 hours. The greater than 2 MeV electron flux was at nominal levels over the past 24 hours and is expected to rise to moderate levels for the next 24 hours as a response to the Coronal Hole (CH) crossing Central Meridian on May 15.

The solar wind speed near Earth oscillated between the values of 285 to 330 km/s (DSCOVR). The Interplanetary Magnetic Field (IMF) was predominantly oriented towards the Earth (phi angle in the positive sector). Bz varied between -3 and +4 nT. The magnitude of the magnetic field varied between 1 and 5 nT. For the next 24 hours the solar wind speed is expected to increase late May 18 due to the expected arrival of the high speed stream associated with the CH crossing Central Meridian on May 15.

Quiet geomagnetic conditions were registered for the past 24 hours (K Dourbes recorded values 0-2 and NOAA Kp 0-1). Quiet to unsettled (K Dourbes = 3) geomagnetic conditions are expected for the next 24 hours.

Today's estimated international sunspot number (ISN): 000, based on 27 stations.

Solar indices for 17 May 2020

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	///
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 35 stations

Noticeable events summary

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

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