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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2023 Oct 14 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
14 Oct 2023	147	005
15 Oct 2023	142	008
16 Oct 2023	140	003

Solar Active Regions and flaring

Solar flaring activity was low during the last 24 hours, with the brightest flare being a C9 today 04:58 UTC from NOAA Active Region (AR) 3460 (magnetic configuration Beta-Gamma, Catania group 87). In total there were only a few C-class flares detected with the yet-unnamed AR at N11E88 producing the largest number of flares. More C-class activity is expected in the next 24 hours.

Espulsioni di massa coronale

No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours.

Vento solare

The Solar Wind (SW) conditions are still affected by the arrival of a High Speed Stream (HSS) in 12 Oct. This HSS is consisted of two parts, as can be seen from the rapid increase in SW speed from 400 to 500 km/h yesterday at 21:50 UTC. As a result of this event, the total interplanetary magnetic field (Bt) dropped from 20 nT to below 5 nT. Its North-South component (Bz) varied between -10 and 20 nT but now ranges between -5 and 5 nT. The interplanetary magnetic field phi angle was predominantly directed towards the Sun during the last 24 hours. The SW conditions are expected to remain under the influence of the HSS for the next 24 hours.

Geomagnetism

Geomagnetic conditions were globally quiet to unsettled (NOAA Kp 2- to 3) during the last 24 hours, with the exception of active conditions (Kp 4-) yesterday 15:00-18:00 UTC. Locally they were at quiet to unsettled levels (K Bell 0-3) throughout the past 24 hours. They are expected to remain quiet to unsettled for the next 24 hours, both globally and locally.

Proton flux levels

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

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain below this threshold during the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 114, based on 19 stations.

Solar indices for 13 Oct 2023

Wolf number Catania	108
10cm solar flux	149
AK Chambon La Forêt	019
AK Wingst	015
Estimated Ap	016
Estimated international sunspot number	113 - Based on 17 stations

Noticeable events summary

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

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