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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2015 May 01 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 01 May 2015 until 03 May 2015
Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

10cm fluxAp
01 May 2015108014
02 May 2015114009
03 May 2015120009

Bulletin

There are only two active regions (AR) on the solar disk. NOAA AR 2335, located at the East limb, produced some flaring activity at the C-level before and after the UT midnight. No Earth-bound CMEs were observed. Further flaring activity at the C-level is expected, mainly from NOAA 2335. Solar wind speed was around 350 km/s till 7 UT, when it increased to a current value around 440 km/s. The magnitude of the Interplanetary Magnetic Field (IMF) remains near 10 nT, with a fluctuating Bz component. The quiet to unsettled (K=0 to 3) geomagnetic conditions are expected to continue, with some chance for a few time slots of active (K=4) conditions.

Today's estimated international sunspot number (ISN): 016, based on 11 stations.

Solar indices for 30 Apr 2015

Wolf number Catania014
10cm solar flux102
AK Chambon La Forêt008
AK Wingst005
Estimated Ap004
Estimated international sunspot number/// - Based on /// 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 X2026/02/04X4.21
Ultimo brillamento M2026/02/25M2.3
Ultima tempesta geomagnetica2026/02/22Kp5+ (G1)
Giorni senza macchie
Ultimi 365 giorni3 giorni
20263 giorni (5%)
Ultimo giorno senza macchie2026/02/24
Media mensile Numero di Macchie Solari
gennaio 2026112.6 -11.4
febbraio 202676.8 -35.8
Ultimi 30 giorni83.6 -38.4

Questo giorno nella storia*

Brillamenti solari
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22004M8.24
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DstG
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41990-76
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*dal 1994

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