Viewing archive of Tuesday, 29 July 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Jul 29 1216 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
29 Jul 2014	140	004
30 Jul 2014	145	004
31 Jul 2014	150	004

Bulletin

The strongest flare of the last 24 hours took place in NOAA 2125. The C2 flare peaked at 14:10UT and was associated to a non-Earth directed CME. The 4 other C-class flares were all minor C1 events taking place in the trailing portion of growing active region NOAA 2126.The other 8 sunspot groups were quiet, including NOAA 2127 which has some mixed magnetic polarities. Further C-class flaring is expected, in particular from NOAA 2126 and 2127. After yesterday's sector boundary crossing, solar wind speed decreased from 450 to 350 km/s. Initially, Bz varied between +6 and -6 nT, but its amplitude gradually decreased to 2 near the end of the reporting period. Geomagnetic conditions evolved from unsettled to quiet. Quiet geomagnetic conditions are expected, with locally an unsettled period possible.

Today's estimated international sunspot number (ISN): 100, based on 15 stations.

Solar indices for 28 Jul 2014

Wolf number Catania	184
10cm solar flux	132
AK Chambon La Forêt	016
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	086 - Based on 22 stations

Noticeable events summary

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

All times in UTC

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