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Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2023 Oct 08 1246 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
08 Oct 2023	157	007
09 Oct 2023	157	007
10 Oct 2023	157	007

Solar Active Regions and flaring

Solar flaring activity over the past 24 hours was moderate with one M-class flare and several C-class flares. The larger flare was the M1.8-class flare peaking at 18:06 UTC on Oct 7 occurring in the NOAA Active Region 3460. There are currently 9 numbered active regions with alpha or beta magnetic field configurations. The most complex regions are NOAA AR 3451 and NOAA AR 3452 (beta-gamma). The solar flaring activity is likely to be at low levels over the coming days with C-class flares expected especially from the NOAA AR 3451, NOAA AR 3452 and NOAA AR 3460, with a chance for isolated M-class flares and X-class flaring.

Корональні викиди маси

A C6.7-class flare peaking at 03:40 UTC on Oct 8 occurring in the NOAA Active Region 3460 was associate with Coronal Mass Ejection (CME). The CME was observed in SOHO/LASCO-C2 at 03:48 UTC. Based on the source location of the active region and the trajectory of the CME, no Earth-directed component is expected. No other Earth-directed Coronal Mass Ejections have been detected in the last 24 hours in the available SOHO/LASCO images.

Корональні діри

A large equatorial corona hole with a negative magnetic polarity has reached the central meridian today Oct 8.

Сонячний вітер

In the last 24 hours, the solar wind conditions near Earth show a return to slow solar wind conditions. The solar wind speed had values varying between 295 km/s and 360 km/s. The total interplanetary magnetic field was below 6.0 nT. The Bz-component of the interplanetary magnetic showed mainly negative values with a minimum value of -5.4 nT. The solar wind is expected to remain at nominal conditions in the next 24 hours.

Geomagnetism

The geomagnetic conditions over the past 24 hours were quite with short period of unsettled condition visible locally (K Bel 1-3, Kp- NOAA 1-2). Quiet 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): 148, based on 12 stations.

Solar indices for 07 Oct 2023

Wolf number Catania	///
10cm solar flux	157
AK Chambon La Forêt	009
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	127 - Based on 25 stations

Noticeable events summary

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

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