Visualizzazione archivio di sabato, 26 aprile AM

Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 Apr 26 1225 UTC

SIDC Forecast

Valid from 1230 UTC, 26 Apr 2014 until 28 Apr 2014
Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
26 Apr 2014122005
27 Apr 2014119012
28 Apr 2014117005

Bulletin

Five low-level C-class flares were observed. They originated from behind the southwest limb (probably NOAA 2035), from sunspot groups NOAA 2038 and NOAA 2045, and from a region which was still behind the northeast limb. No CMEs with an Earth-directed component were observed. There remains a chance on further C-class flares. Solar wind speed declined from about 430 to 360km/s. Bz was weak and mostly negative at -4nT, with brief excursions up to +2nT. The particle stream from a small equatorial coronal hole that passed the central meridian early on 24 April, is expected to arrive at Earth most probably tomorrow. The geomagnetic field has been quiet and expected to remain so. Locally, a brief active interval is possible from the effect of the coronal hole.

Today's estimated international sunspot number (ISN): 034, based on 12 stations.

Solar indices for 25 Apr 2014

Wolf number Catania///
10cm solar flux125
AK Chambon La Forêt011
AK Wingst010
Estimated Ap010
Estimated international sunspot number045 - Based on 19 stations

Noticeable events summary

DayBeginMaxFineLocStrengthOP10cmCatania/NOAARadio burst types
Nessuna

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

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