Viewing archive of Friday, 19 April 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Apr 19 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
19 Apr 2019	075	006
20 Apr 2019	072	007
21 Apr 2019	071	003

Bulletin

Solar activity was at very low levels. There are two sunspot groups visible on the solar disk, with NOAA 2738 about to round the Sun's west limb. No earth-directed coronal mass ejections were observed over the last 24 hours. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

Solar wind speed slowly increased from about 300 km/s to near 340 km/s by the end of the period (DSCOVR). Bz varied between -5 and +5 nT. The interplanetary magnetic field was directed towards the Sun (negative sector) until 06:30UT, when it switched to away from the Sun (positive sector). Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue, with a chance on an unsettled interval on 19-20 April.

Today's estimated international sunspot number (ISN): 024, based on 22 stations.

Solar indices for 18 Apr 2019

Wolf number Catania	027
10cm solar flux	075
AK Chambon La Forêt	005
AK Wingst	///
Estimated Ap	003
Estimated international sunspot number	026 - Based on 33 stations

Noticeable events summary

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

All times in UTC

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