Viewing archive of Wednesday, 31 July 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2013 Jul 31 1156 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
31 Jul 2013	116	006
01 Aug 2013	116	007
02 Aug 2013	116	013

Bulletin

NOAA AR 1801 (Catania 38) produced a C-flare yesterday, July 30. A new region turned over the east limb: NOAA AR 1809 (Catania 55). It was the source of a B and C-flares yesterday and today. We expect more C-flares from this region. The geomagnetic conditions are quiet. From August 2, Earth might come under the influence of a fast solar wind emanating from the coronal hole in the northern hemisphere. Unsettled conditions are possible.

Today's estimated international sunspot number (ISN): 067, based on 18 stations.

Solar indices for 30 Jul 2013

Wolf number Catania	079
10cm solar flux	113
AK Chambon La Forêt	010
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	055 - Based on 14 stations

Noticeable events summary

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

All times in UTC

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