Viewing archive of Friday, 28 September 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Sep 28 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
28 Sep 2018	068	008
29 Sep 2018	068	008
30 Sep 2018	068	007

Bulletin

Solar activity was very low with X-ray flux remaining below B level and no spots on the visible disk. This is expected to remain so over the next days.

No Earth directed CMEs have been recorded in coronagraph images.

Proton flux levels were at background values and are expected to remain so.

Solar wind conditions were near nominal. Solar wind speed was between 390 and 440 km/s, and is currently around 400 km/s. Total magnetic field was 2-6nT with Bz variable. The magnetic field phi angle was in the positive sector. Solar conditions are expected to remain near nominal over the next days.

Geomagnetic conditions were quiet to unsettled (NOAA Kp as well as local K Dourbes 1-3). Generally, quiet conditions are expected over the next days.

Today's estimated international sunspot number (ISN): 000, based on 23 stations.

Solar indices for 27 Sep 2018

Wolf number Catania	000
10cm solar flux	067
AK Chambon La Forêt	014
AK Wingst	007
Estimated Ap	007
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

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