Viewing archive of Tuesday, 29 April 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2014 Apr 29 1222 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Solar protons

Quiet

	10cm flux	Ap
29 Apr 2014	122	011
30 Apr 2014	125	006
01 May 2014	125	005

Bulletin

Five sunspot regions are visible at the front side of the solar disk. Catania sunspot group 34 (NOAA AR 2049) showed some growth. All other groups were stable. One C3.4 flare was measured by GOES (peak time 15:26 UT on 28 April), originating from Catania sunspot group 31 (NOAA AR 2048). More C-class flares are possible during the next 48 hours. No Earth- directed CMEs were observed. Solar wind speed has declined to only 280 km/s. The magnitude of the interplanetary magnetic field is currently lower than 5 nT. Geomagnetic conditions were quiet and are expected to remain as such. An isolated time slot of active conditions is still possible at arrival of a high speed stream related to the coronal hole that passed the central meridian early on 24 April.

Today's estimated international sunspot number (ISN): 052, based on 11 stations.

Solar indices for 28 Apr 2014

Wolf number Catania	093
10cm solar flux	121
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	007
Estimated international sunspot number	058 - 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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