Viewing archive of Thursday, 27 September 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Sep 27 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
27 Sep 2018	068	008
28 Sep 2018	068	012
29 Sep 2018	068	011

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.

This morning (September 27), a filament located around S26E11 erupted slowly, but available coronagraph images seem to indicate that there is no CME associated.

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

Solar wind conditions were slowly moving towards the nominal regime. Solar wind speed saw a general decreasing trend from around 450 km/s to 410 km/s currently. Total magnetic field was 2-6nT with Bz variable. The magnetic field phi angle was in the positive sector. Solar conditions are expected to become and remain 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 with isolated unsettled conditions possible.

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

Solar indices for 26 Sep 2018

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	012
AK Wingst	010
Estimated Ap	008
Estimated international sunspot number	000 - Based on 34 stations

Noticeable events summary

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

All times in UTC

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