Viewing archive of Wednesday, 26 September 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Sep 26 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
26 Sep 2018	068	007
27 Sep 2018	068	007
28 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 identified in coronagraph images.

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

Solar wind conditions remained slightly elevated with solar wind speed reaching a peak of 480 km/s but mostly below 450 km/s. Total magnetic field was between 2-7.5nT. The magnetic field phi angle was in the positive sector for the entire period. Solar wind conditions should slowly turn to nominal over next days, with some slight increases possible under the influence of a negative polarity coronal hole in the Southern hemisphere.

Geomagnetic conditions were quiet to unsettled (NOAA Kp 1-3 and local K Dourbes 0-3) and quiet to unsettled conditions are expected to continue over the next days.

Today's estimated international sunspot number (ISN): 000, based on 25 stations.

Solar indices for 25 Sep 2018

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	014
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	000 - Based on 32 stations

Noticeable events summary

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

All times in UTC

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