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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2020 Sep 11 1231 UTC

SIDC Forecast

Valid from 1230 UTC, 11 Sep 2020 until 13 Sep 2020
Brillamenti solari

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

10cm fluxAp
11 Sep 2020069001
12 Sep 2020070002
13 Sep 2020070002

Bulletin

The Sun was spotless. Solar activity was at very low levels and is expected to remain so.

The greater than 10 MeV proton flux was at nominal levels and expected to remain so. The greater than 2 MeV electron flux reached moderate levels, with a maximum of 3580 pfu at 19:50UT. The electron flux is expected to reach moderate levels again.

No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery.

Solar wind speed was mostly between 280 and 310 km/s (DSCOVR). Bz varied between -4 and +5 nT. The direction of the interplanetary magnetic field (phi angle) was predominantly towards the Sun (negative sector).

Geomagnetic activity was at quiet levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 000, based on 26 stations.

Solar indices for 10 Sep 2020

Wolf number Catania000
10cm solar flux069
AK Chambon La Forêt003
AK Wingst002
Estimated Ap002
Estimated international sunspot number000 - Based on 33 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 X2025/12/08X1.1
Ultimo brillamento M2025/12/31M7.11
Ultima tempesta geomagnetica2026/01/02Kp5 (G1)
Giorni senza macchie
Ultimo giorno senza macchie2022/06/08
Media mensile Numero di Macchie Solari
dicembre 2025124 +32.2
gennaio 2026119.3 -4.8
Ultimi 30 giorni108.9 +1.7

Questo giorno nella storia*

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52025-71
*dal 1994

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