Viewing archive of Saturday, 7 September 2024

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2024 Sep 07 1241 UTC

SIDC Forecast

Solar flares

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
07 Sep 2024	239	010
08 Sep 2024	239	015
09 Sep 2024	239	007

Solar Active Regions and flaring

Solar flaring activity was at moderate levels over the past 24 hours, with several C-class flares and one M-class flare. The strongest was an M1.7 flare from NOAA active region (AR) 3813, which peaked at 07:46 UTC on September 7. The most magnetically complex active regions currently on the disk are NOAA AR 3806 (beta-gamma-delta), AR 3813 (beta-gamma), and the newly emerged AR 3815 (beta-gamma). Solar flaring activity is expected to remain at moderate levels over the next 24 hours, with the possibility of an M-class flare and a chance for isolated X-class flares.

Coronal mass ejections

No Earth-directed coronal mass ejection (CME) was detected in LASCO/C2 coronagraph images over the past 24 hours.

Solar wind

The solar wind parameters reflect a slow wind speed regime. The total interplanetary magnetic field (IMF) ranged between 5 nT and 8 nT, slightly increasing over the last 6 hours and reaching 10 nT. The southward IMF component (Bz) fluctuated between -7 nT and +9 nT. The solar wind speed remained around 335-430 km/s. Solar wind conditions are expected to become more enhanced in the next 24 hours due to the September 3 coronal mass ejection, combined with the high-speed stream from the small negative polarity coronal hole that crossed the central meridian on September 3.

Geomagnetism

Geomagnetic conditions were quiet both globally and locally, with some periods of unsettled conditions (NOAA Kp and K-Dourbes indices of 1-3). Quiet to unsettled conditions are expected in the next 24 hours, with possible active periods in response to the anticipated enhancement of solar wind conditions.

Proton flux levels

The greater than 10 MeV GOES proton flux has now returned to background levels. It is expected to remain at background levels over the next 24 hours. However, there is a small chance of exceeding the threshold if high-energy flares or eruptions occur.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, remained below the threshold over the past 24 hours and is expected to remain so in the coming 24 hours. The 24-hour electron fluence is currently at normal levels and is expected to stay that way over the next 24 hours.

Today's estimated international sunspot number (ISN): 162, based on 10 stations.

Solar indices for 06 Sep 2024

Wolf number Catania	263
10cm solar flux	249
AK Chambon La Forêt	014
AK Wingst	007
Estimated Ap	007
Estimated international sunspot number	188 - Based on 17 stations

Noticeable events summary

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

All times in UTC

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