Viewing archive of Saturday, 22 July 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Jul 22 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
22 Jul 2017	069	016
23 Jul 2017	069	017
24 Jul 2017	069	008

Bulletin

With no spotted regions on disk, no Solar flaring activity was recorded and this is expected to remain so. No Earth directed CMEs have been observed in coronagraph data. Solar proton fluxes are at background values and are expected to remain so.

Solar wind saw the continued influence of a coronal hole high speed stream. Solar wind speed declined from a peak over 700 km/s to around 550 km/s presently. Total magnetic field remained around 7nT throughout the period. Bz was mostly variable but saw some excursions to -7nT. Over the next 2 days we should see a return to nominal Solar wind conditions. Geomagnetic conditions were quiet to active (both local K Dourbes and NOAA Kp 1-4) with only a limited number of active periods. Geomagnetic conditions are expected to be quiet to unsettled over the next days.

Today's estimated international sunspot number (ISN): 000, based on 18 stations.

Solar indices for 21 Jul 2017

Wolf number Catania	000
10cm solar flux	069
AK Chambon La Forêt	019
AK Wingst	016
Estimated Ap	018
Estimated international sunspot number	000 - Based on 35 stations

Noticeable events summary

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

All times in UTC

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