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

Valid from 1230 UTC, 17 May 2018 until 19 May 2018
Solar flares

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

Geomagnetism

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

Solar protons

Quiet

10cm fluxAp
17 May 2018070024
18 May 2018070007
19 May 2018070007

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 Catania000
10cm solar flux070
AK Chambon La Forêt012
AK Wingst004
Estimated Ap004
Estimated international sunspot number000 - Based on 30 stations

Noticeable events summary

DayBeginMaxEndLocStrengthOP10cmCatania/NOAARadio burst types
None

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

All times in UTC

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