Viewing archive of Friday, 27 September 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Sep 27 1247 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 2013	107	006
28 Sep 2013	105	006
29 Sep 2013	103	008

Bulletin

Flaring activity is in the B-level. We don't expect it to change. A large filament is now at the central meridian. It is stable up to now. A coronal hole in visible in the northern hemisphere between 35° and 50° latitude, around 25° wide. It reached the central meridian yesterday, September 26. The coronal hole is not recurrent. Geomagnetic influence is possible in 2-3 days. At the moment, the geomagnetic conditions are quiet.

Today's estimated international sunspot number (ISN): 041, based on 19 stations.

Solar indices for 26 Sep 2013

Wolf number Catania	090
10cm solar flux	110
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	037 - 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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