Viewing archive of Saturday, 7 October 2023

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2023 Oct 07 1246 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
07 Oct 2023	155	007
08 Oct 2023	155	007
09 Oct 2023	155	007

Solar Active Regions and flaring

Solar flaring activity over the past 24 hours was quiet with only one small C-class flares beside the number of bipolar regions on the solar disc visible from Earth. There are currently 10 numbered active regions with alpha or beta magnetic field configurations. The most complex regions are NOAA AR 3451 (beta-gamma) and NOAA AR 3452 (beta-gamma). The solar flaring activity is likely to be at quiet levels over the coming days with C-class flares expected, and a low chance for isolated M-class flares and X-class flaring.

Coronal mass ejections

No other Earth-directed Coronal Mass Ejections have been detected in the last 24 hours in the available SOHO/LASCO images.

Solar wind

In the last 24 hours, the solar wind conditions near Earth remained slightly under the influence of the solar wind streams associated to 2 small positive polarity coronal holes that crossed the central meridian on October 01 and 02. The total interplanetary magnetic field was ranging between 5.0 nT and 7.3 nT. The Bz-component of the interplanetary magnetic showed mainly negative values with a minimum value of -4.6 nT. The solar wind speed had values varying between 337 km/s and 437 km/s. The solar wind is expected to return to nominal conditions in the next hours.

Geomagnetism

The geomagnetic conditions over the past 24 hours were quite to unsettled (K Bel 2-3, Kp-NOAA 2-3) due to the slight enhancement of the solar wind conditions. Quiet to unsettled conditions are expected in the next 24 hours.

Proton flux levels

The greater than 10 MeV proton flux was at background levels over the last 24 hours. It is expected to mostly remain at background level, however possible rise of the proton flux cannot be fully excluded due to the current number of complex regions on the disc.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux measured by GOES-16 was below the 1000 pfu threshold. The greater than 2 MeV electron flux is expected remains below the threshold in the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain at normal levels in the next 24 hours.

Today's estimated international sunspot number (ISN): 126, based on 15 stations.

Solar indices for 06 Oct 2023

Wolf number Catania	193
10cm solar flux	155
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	152 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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