Vaata neljapäev, 9 aprill 2020 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2020 Apr 09 1231 UTC

SIDC Forecast

Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

	10cm flux	Ap
09 Apr 2020	069	005
10 Apr 2020	069	021
11 Apr 2020	069	031

Bulletin

Solar activity was very low with only a single B level flare. There are no spotted regions on disk and Solar flaring is expected to remain below C level over the next days.

No Earth directed Coronal Mass Ejections (CMEs) were 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 background levels the past 24 hours and is expected to remain so.

Solar wind conditions continued to enhance over yesterday afternoon. Solar wind speed reached a peak of around 500km/s around 19UT before starting a gradual decline to under 400 km/s currently. Total magnetic field reached to 12nT early in the period with a variable Bz with peaks down to -9nT. Total magnetic field is currently back at a nominal 5nT level. The magnetic field phi angle was variable but now steady in the negative sector again. Solar wind conditions are expected to remain close to nominal over the next 24 hours with more significant enhancements expected by April 11, due to the low latitude extension of the southern polar coronal hole that has transited the central meridian in the past days.

Geomagnetic conditions were quiet to active (NOAA Kp 1-3 and local K Dourbes 0-4) in response to the moderate Solar wind enhancements. Unsettled conditions are expected over the next 24 hours and by April 11 are active conditions expected with possibly minor geomagnetic storm periods.

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

Solar indices for 08 Apr 2020

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	020
AK Wingst	015
Estimated Ap	015
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

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