Viewing archive of Saturday, 28 September 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Sep 28 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

	10cm flux	Ap
28 Sep 2019	068	040
29 Sep 2019	069	022
30 Sep 2019	069	012

Bulletin

Solar X-ray flux remained below B class levels throughout the period. The Solar disk is spotless and the X-ray flux is expected to remain at or below background levels.

There were no Earth-directed Coronal Mass Ejections (CME) observed in coronagraph data.

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

The solar wind speed has increased from 500 to 700 km/s yesterday as we entered a high speed stream (HSS) from a recurrent positive polarity coronal hole, and has remained at high levels since then. The total magnetic field strength has fluctuated between 6 and 15 nT. The Bz ranged between -10 and 6 nT. Geomagnetic conditions ranged between Kp index 1-5 (NOAA) and local K index 2-5 (Dourbes).

The Solar wind conditions will remain at enhanced levels over the next 24 hours before slowly declining over the following days.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 27 Sep 2019

Wolf number Catania	000
10cm solar flux	066
AK Chambon La Forêt	044
AK Wingst	026
Estimated Ap	025
Estimated international sunspot number	000 - Based on 25 stations

Noticeable events summary

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

All times in UTC

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