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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 May 22 1230 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
22 May 2019	068	006
23 May 2019	068	009
24 May 2019	067	006

Bulletin

Over the past 24 hours solar activity has been low. The visible solar disc was spotless and the X-ray flux remained below B-class level. No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours.

The solar wind speed has fluctuated between around 345 and 405 km/s over the past 24 hours. The total magnetic field strength fluctuated between 0.6 and 5 nT. The Bz component ranged between approximately -3 and +3 nT. The phi angle was positive until 8 UT this morning (22 May) when it switched into the negative sector.

Geomagnetic conditions have been quiet over the past 24 hours, with Kp index (NOAA) and local K index (Dourbes) both ranging between 0 and 2. Quiet to unsettled geomagnetic conditions are expected over the next 24 hours, due to the weak solar wind stream associated with a series of small negative polarity coronal holes.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 21 May 2019

Wolf number Catania	000
10cm solar flux	068
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	000 - Based on 29 stations

Noticeable events summary

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

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