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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2023 Jun 16 1233 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Protoni solari

Quiet

	10cm flux	Ap
16 Jun 2023	165	035
17 Jun 2023	170	024
18 Jun 2023	168	012

Solar Active Regions and flaring

The solar flaring activity was at moderate levels. The largest flare was a M1.1 flare peaking at 10:38 UTC on June 16, associated with NOAA AR 3337. Another M1 flare, associated with NOAA AR 3338 was observed with peak time 05:30 UTC on June 16. NOAA AR 3338, 3336, 3335 and along with NOAA AR 3333 are the most complex regions on the solar disk. NOAA AR 3336 also produced a long duration C9.7 flare, peaking at 12:55 UTC June 15. The other regions on the disk are magnetically simple and did not produce any significant flaring activity. The solar flaring activity is expected to be at low levels over the next 24 hours with C-class flares likely and M-class flares possible.

Espulsioni di massa coronale

In the last 24 hours there were no Earth-directed Coronal Mass Ejections (CMEs) detected in the available coronagraph observations.

Vento solare

The solar wind conditions reflected the influence of the expected corotating Interaction Region (CIR). The interplanetary magnetic field increase to values around 20nT, peaking at 21:00 UTC. Bz had a minimum value of -13nT and was predominantly negative. The solar wind speed increased from 350km/s to values above 650 km/s. The magnetic field orientation switched from the positive sector to the negative sector (field directed away from the Sun) from around 13:00 UTC June 15. The interplanetary magnetic field and solar wind speed are expected to continue to be elevated over next day and the high solar wind speeds are expected to persist over the next few days due to continued influence of the high speed stream.

Geomagnetism

During last 24 hours the geomagnetic conditions reached moderate storm conditions globally and minor storm conditions locally (NOAA KP 4-6 and K-Bel 3-5). Geomagnetic conditions are expected to be at active to minor storm levels with further isolated moderate storm conditions also possible, particularly on June 16.

Proton flux levels

Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next days.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux was below the 1000 pfu threshold and is to remain below this threshold for the next day. The 24h electron fluence was at normal levels. The electron fluence is expected to be at normal levels in the next days.

Today's estimated international sunspot number (ISN): 127, based on 22 stations.

Solar indices for 15 Jun 2023

Wolf number Catania	///
10cm solar flux	153
AK Chambon La Forêt	049
AK Wingst	026
Estimated Ap	027
Estimated international sunspot number	119 - Based on 30 stations

Noticeable events summary

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

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