Viewing archive of Tuesday, 28 May 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 May 28 1246 UTC

SIDC Forecast

Solar flares

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
28 May 2013	110	008
29 May 2013	104	003
30 May 2013	104	008

Bulletin

Active regions NOAA 1755 and 1756 have further decreased in size. Solar activity was very low during the past 24 hours. There still is a chance for C-class flare activity. The solar wind speed measured by ACE still reaches high values, currently being at 700 km/s. The magnitude of the interplanetary magnetic field is lower than 5 nT. Geomagnetic conditions are quiet to unsettled and are expected to remain so for the next 48 hours. From the end of day 3 on, we expect the influence of a coronal hole currently approaching the central meridian.

Today's estimated international sunspot number (ISN): 053, based on 15 stations.

Solar indices for 27 May 2013

Wolf number Catania	110
10cm solar flux	110
AK Chambon La Forêt	023
AK Wingst	020
Estimated Ap	018
Estimated international sunspot number	062 - Based on 20 stations

Noticeable events summary

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

All times in UTC

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