Viewing archive of Friday, 23 August 2024

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2024 Aug 23 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
23 Aug 2024	233	012
24 Aug 2024	230	007
25 Aug 2024	230	007

Solar Active Regions and flaring

Solar flaring activity was moderate over the past 24 hours. The largest flare was a M3.4-flare, with peak time 03:41 UTC on August 23 2024, from NOAA AR 3801 (beta). There are currently 10 numbered active regions on the visible disk. NOAA AR 3796 and 3790 are the most complex AR (beta-gamma). The solar flaring activity is expected to be at moderate levels over the next 24 hours with C-class flares expected, M-class flares probable and a small chance of X-class flares.

Coronal mass ejections

A Coronal Mass Ejections (CMEs) have been detected in LASCO C2 data at 02:06 UTC on August 23. This CME is most likely associated with the C5.7 flare from NOAA AR 3794 with peak time 01.26 UTC on August 23. The bulk of the CME is directed to the west, but a glancing blow can not be excluded on August 26. Further analysis is ongoing.

Solar wind

The solar wind at the Earth remained slow over the last 24 hours. The solar wind speed slightly increased to 400 km/s then reduced again to around 350 km/s. The interplanetary magnetic field fluctuated around 8nT and 12 nT. The Bz reached a minimum value of -10nT. Small enhancements of the solar wind speed may occur on August 23 due to a possible high-speed-stream arrival associated with the coronal hole that crossed the central meridian on August 20.

Geomagnetism

Geomagnetic conditions were globally and locally quiet to unsettled (Kp 3+ and K Bel 3). Geomagnetic conditions may reach unsettled levels on the 23 August, due to a possible high-speed stream arrival.

Proton flux levels

The greater than 10 MeV proton flux remained below the 10 pfu threshold and is expected to remain so over the next days.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux remained below the 1000 pfu alert threshold, and is expected to remain below the threshold during the next 24 hours. The 24h electron fluence was at normal levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 207, based on 16 stations.

Solar indices for 22 Aug 2024

Wolf number Catania	164
10cm solar flux	231
AK Chambon La Forêt	011
AK Wingst	014
Estimated Ap	014
Estimated international sunspot number	212 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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