Viewing archive of Sunday, 7 April 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Apr 07 1237 UTC

SIDC Forecast

Solar flares

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
07 Apr 2019	076	008
08 Apr 2019	076	007
09 Apr 2019	076	007

Bulletin

Returning region NOAA 2736 at the East limb produced several B flares. The brightest flare was a B9 flare peaking at 11:00 UT on April 7. The chance for a C flare in the next 24 hours is estimated at 50%, especially from returning region 2736.

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.

Solar wind speed near Earth as registered by DSCOVR varied between about 385 and 530 km/s in the past 24 hours, with current values around 400 km/s. The Interplanetary Magnetic Field (IMF) was directed predominantly towards the Sun and its magnitude varied between about 2 and 4 nT, with current values around 3 nT. Bz was never below -5 nT.

Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 1 and 2) were registered in the past 24 hours. Quiet to unsettled levels (K Dourbes < 4) are expected in the second half of April 7, and on April 8 and 9.

Today's estimated international sunspot number (ISN): 011, based on 16 stations.

Solar indices for 06 Apr 2019

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	011
AK Wingst	008
Estimated Ap	008
Estimated international sunspot number	000 - Based on 18 stations

Noticeable events summary

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

All times in UTC

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