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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2020 Apr 20 1231 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Сонячні протони

Quiet

	10cm flux	Ap
20 Apr 2020	069	029
21 Apr 2020	069	019
22 Apr 2020	069	007

Bulletin

Solar X-ray flux remained below B level. There are no spotted regions on disk and Solar flaring is expected to remain below C level over the next days.

There were no Earth directed Coronal Mass Ejections (CMEs) observed in the available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to stay at nominal levels. The greater than 2 MeV electron flux was at nominal levels the past 24 hours. An increase of the electron flux may be expected following the high speed Solar wind conditions over the next days.

Solar wind was initially at background conditions with speed around 300 km/s and total magnetic field under 5nT; until 1:30UT when Solar wind conditions became enhanced. By 8UT total magnetic field even reached over 15nT, with a sustained and pronounced negative Bz of -15nT. Only in the past hour Bz eased to a more moderate -5nT. Solar wind speed has so far not climbed above 380 km/s. The phi angle saw some excursions back and forth between the negative and positive sector, but seems to have mainly switched into the positive sector. The enhanced Solar wind conditions are expected to continue over the next days, associated with a series of patchy coronal holes.

Geomagnetic conditions reached minor geomagnetic storm conditions (NOAA Kp and local K Dourbes 0-5). In the next 24 to 48 hours active conditions are expected to continue with a possibility of further minor geomagnetic storm episodes.

Today's estimated international sunspot number (ISN): 000, based on 25 stations.

Solar indices for 19 Apr 2020

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	008
AK Wingst	001
Estimated Ap	002
Estimated international sunspot number	000 - Based on 30 stations

Noticeable events summary

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

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