Viewing archive of Wednesday, 17 April 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Apr 17 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
17 Apr 2019	075	003
18 Apr 2019	074	003
19 Apr 2019	074	008

Bulletin

Solar activity was at very low levels. There are currently two sunspot groups on the solar disk: active region NOAA 2738, and a small, not yet numbered region located near N05W12 that started its development after 07UT. 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 gradually decreased from its initial 400 km/s to its current values just below 350 km/s (DSCOVR). Bz varied between -3 and +3 nT. The interplanetary magnetic field remained predominantly directed towards the Sun (negative sector). Quiet geomagnetic conditions were observed.

Quiet geomagnetic conditions are expected to continue, with a small chance on an isolated unsettled interval.

Today's estimated international sunspot number (ISN): 012, based on 15 stations.

Solar indices for 16 Apr 2019

Wolf number Catania	011
10cm solar flux	074
AK Chambon La Forêt	010
AK Wingst	///
Estimated Ap	009
Estimated international sunspot number	012 - Based on 32 stations

Noticeable events summary

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

All times in UTC

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