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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2016 May 01 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 01 May 2016 until 03 May 2016
Brillamenti solari

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

Geomagnetism

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

Protoni solari

Quiet

10cm fluxAp
01 May 2016094014
02 May 2016096010
03 May 2016098007

Bulletin

Solar activity has been low, only one C-class flare in past 24 h: a C2.4 flare that peaked at 09:22 UT from NOAA AR 2539 (Catania 66 and 67). Six active regions are visible on the disk, three of them with beta magnetic field configuration and the rest with alpha magnetic field configuration of their photospheric field. C-class flaring is likely for the next 24 h.

Geomagnetic conditions have been quiet. Solar wind speed is at 375 km/s with interplanetary magnetic field magnitude of 10 nT. Active conditions (with isolated minor storm periods) are expected when the fast speed stream from a coronal hole arrives to the Earth later today.

Today's estimated international sunspot number (ISN): 085, based on 13 stations.

Solar indices for 30 Apr 2016

Wolf number Catania///
10cm solar flux094
AK Chambon La Forêt014
AK Wingst008
Estimated Ap008
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 202678.9 -33.7
Ultimi 30 giorni86.6 -35.9

Questo giorno nella storia*

Brillamenti solari
12014X7.13
22023M6.3
32025M3.6
42026M2.3
52024M2.1
DstG
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21959-135G3
31990-95G1
41971-83G2
51982-75G2
*dal 1994

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