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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 May 20 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
20 May 2019	066	010
21 May 2019	066	017
22 May 2019	066	010

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected. 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 350 and 415 km/s over the past 24 hours. The total magnetic field strength fluctuated around 6 nT for the first part of the period and then slowly increased to a maximum of around 9 nT at around 7:00 UT. The Bz component fluctuated around 0 nT, ranging between -6.3 and +7.7 nT.

Geomagnetic conditions ranged between Kp index 0-3 (NOAA) and local K index 0-3 (Dourbes) over the past 24 hours. Quiet to unsettled geomagnetic levels are expected to continue. Some isolated active intervals are also possible, due to the expected arrival of a weak solar wind stream associated with a recurring, negative polarity equatorial coronal hole which traversed the central meridian on 18 May.

Today's estimated international sunspot number (ISN): 000, based on 10 stations.

Solar indices for 19 May 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	010
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	000 - Based on 18 stations

Noticeable events summary

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

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