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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2014 May 26 1221 UTC

SIDC Forecast

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

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
26 May 2014108005
27 May 2014103008
28 May 2014100005

Bulletin

There are currently 6 sunspot groups visible on the solar disk. The only region that is actively flaring is NOAA 2065. It produced all 5 C-flares of the period, the strongest a C3.8 flare starting at 23:49UT on 25 May. The associated CME had a speed between 250-300 km/s and was not directed to Earth. The other regions are relatively small and have a simple magnetic configuration. C-class flares are expected, with a small chance on an M-class flare from NOAA 2065. Solar wind speed decreased from 430 to 350 km/s, with Bz varying between +3 and -3 nT. The geomagnetic field was mostly quiet, though locally brief periods with K=3 were recorded. A coronal hole (CH) that passed the central meridian (CM) on 23 May can still influence the geomagnetic field later today or tomorrow. Another CH that passed the CM last night may influence the geomagnetic field starting 29 May. Geomagnetic conditions are expected to be quiet, though locally a brief active episode on 26-27 and 29 May is not excluded.

Today's estimated international sunspot number (ISN): 075, based on 13 stations.

Solar indices for 25 May 2014

Wolf number Catania///
10cm solar flux113
AK Chambon La Forêt010
AK Wingst005
Estimated Ap005
Estimated international sunspot number076 - Based on 23 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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Notizie sul meteo spaziale

Ultimo brillamento X2025/03/28X1.1
Ultimo brillamento M2025/04/01M2.5
Ultima tempesta geomagnetica2025/04/04Kp5+ (G1)
Giorni senza macchie
Ultimo giorno senza macchie2022/06/08
Media mensile Numero di Macchie Solari
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