Viewing archive of Sunday, 23 April 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Apr 23 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
23 Apr 2017	084	046
24 Apr 2017	085	017
25 Apr 2017	086	007

Bulletin

Three ARs on the visible disk, all with simple magnetic field configuration. No C-class flares in past 24 h, they remain possible in the next 24 h.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The Earth is still inside a high speed solar wind stream, geomagnetic conditions reached minor storm levels locally (K = 5) and major storm at planetary levels (Kp = 6). The solar wind speed increased to reach 750 km/s currently with interplanetary magnetic fields of 7 nT. Disturbed geomagnetic conditions are expected to prevail for the next 24 h.

Today's estimated international sunspot number (ISN): 042, based on 27 stations.

Solar indices for 22 Apr 2017

Wolf number Catania	///
10cm solar flux	084
AK Chambon La Forêt	057
AK Wingst	039
Estimated Ap	050
Estimated international sunspot number	031 - Based on 27 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page