Viewing archive of Thursday, 17 May 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 May 17 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
17 May 2018	070	024
18 May 2018	070	007
19 May 2018	070	007

Bulletin

No active regions on the visible solar disc. No C-class flares in past 24 h and the situation is not expected to change.

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

The solar wind speed at L1 is at 450 km /s with interplanetary magnetic field magnitude of 10 nT. The speed has increased about 150 km/s since yesterday, showing the first signs of the upcoming arrival of the high speed solar wind stream from a negative polarity coronal hole located in the southern hemisphere. Geomagnetic conditions have ranged from quiet to unsettled and active periods can be expected for the next 48 h (with isolated minor storm periods).

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

Solar indices for 16 May 2018

Wolf number Catania	000
10cm solar flux	070
AK Chambon La Forêt	012
AK Wingst	004
Estimated Ap	004
Estimated international sunspot number	000 - Based on 30 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