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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2019 May 19 1230 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
19 May 2019	070	007
20 May 2019	069	007
21 May 2019	069	019

Bulletin

The Sun produced no flares in the past 24 hours. The chance for a C flare in the next 24 hours is estimated at 5%.

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

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed as registered by DSCOVR decreased from about 420 to 375 km/s in the past 24 hours. The Interplanetary Magnetic Field was predominantly oriented away from the Sun and its magnitude varied between about 3 and 6 nT. Bz was never below -5 nT. Nominal solar wind conditions are expected on May 19 and 20.

Quiet to unsettled geomagnetic conditions (K Dourbes between 0 and 3; NOAA Kp between 0 and 1) were registered in the past 24 hours. Quiet to unsettled geomagnetic levels (K Dourbes < 4) are expected on May 19 and 20. Active intervals (K Dourbes = 4) are possible on May 21, due to the expected arrival of a weak solar wind stream associated with a recurring, negative polarity equatorial coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 09 stations.

Solar indices for 18 May 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	005
Estimated international sunspot number	013 - Based on 21 stations

Noticeable events summary

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

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