Viewing archive of Friday, 17 April 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2020 Apr 17 1231 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 2020	069	007
18 Apr 2020	068	009
19 Apr 2020	069	008

Bulletin

The Sun was spotless again. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux and the greater than 2 MeV electron flux were at nominal values and are expected to remain so.

No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery.

Solar wind speed was on a mostly declining trend, varying between 370 and 300 km/s and ending the period with low values around 310 km/s (DSCOVR). Bz varied between -4 and +3 nT, being mostly negative since 06UT. The direction of the interplanetary magnetic field (phi angle) was in a predominantly sunward orientation (negative sector).

Geomagnetic activity was at quiet levels, with an isolated unsettled episode recorded by Dourbes during the 15-18UT interval. Geomagnetic conditions are expected to be quiet to unsettled during the next few days.

Today's estimated international sunspot number (ISN): 000, based on 27 stations.

Solar indices for 16 Apr 2020

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	007
AK Wingst	006
Estimated Ap	004
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

All times in UTC

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