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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2020 Apr 16 1231 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
16 Apr 2020	069	007
17 Apr 2020	069	008
18 Apr 2020	068	007

Bulletin

The visible solar disk has been devoid of sunspots. 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 over the last 48 hours. An extension of the southern polar coronal hole is transiting the central meridian.

Solar wind speed undulated between mostly 400 and 450 km/s, then decreased after 05UT to its current values around 365 km/s (DSCOVR). Bz varied between -3 and +4 nT, being mostly negative between 18 and 05UT. The direction of the interplanetary magnetic field (phi angle) was in a predominantly sunward orientation (negative sector).

Geomagnetic activity was at quiet levels. 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 15 Apr 2020

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	008
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 35 stations

Noticeable events summary

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

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