Viewing archive of Thursday, 27 June 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jun 27 1253 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
27 Jun 2013	105	008
28 Jun 2013	105	034
29 Jun 2013	107	008

Bulletin

Solar activity has been eruptive during the past 24 hours, featuring two low C flares from NOAA AR 11774 and 11778. More C flares are possible within the next 48 hours, with a slight chance for an M flare. During the past 24 hours, the solar wind speed has decreased from about about 440 to 370 km/s, while the IMF varied between 1.5 and 4 nT. Geomagnetic activity was at quiet levels (K Dourbes between 1 and 3; NOAA Kp = 1) during the past 24 hours. Quiet conditions (K Dourbes < 4) are expected for June 27. On June 28, active levels (K Dourbes=4) with minor storm periods (K Dourbes = 5) are possible as a consequence of the expected arrival at Earth of a new coronal hole high speed stream. The coronal hole high speed stream's geomagnetic effects will likely decrease on June 29, when quiet to active levels (K Dourbes < 5) are expected.

Today's estimated international sunspot number (ISN): 040, based on 12 stations.

Solar indices for 26 Jun 2013

Wolf number Catania	063
10cm solar flux	107
AK Chambon La Forêt	006
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	041 - Based on 18 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page