Viewing archive of Thursday, 24 August 2023

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2023 Aug 24 1231 UTC

SIDC Forecast

Solar flares

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
24 Aug 2023	147	007
25 Aug 2023	145	007
26 Aug 2023	143	010

Solar Active Regions and flaring

There are eight active regions visible on the disk. They all have simple alpha or beta magnetic field configuration. Only C-class flares were observed in the last 24 hours. The strongest flare was a C1.5 with peak at 23:47 UTC on 23 August, from NOAA AR 3405. For the next 24 hours, C-class flares can be expected.

Coronal mass ejections

There were no Earth-directed Coronal Mass Ejections (CMEs) detected in the available coronagraph observations in the last 24 hours.

Solar wind

The Earth is inside a slow solar wind stream, with speed around 430 km/s and an interplanetary magnetic field around 5 nT. The interplanetary magnetic field orientation was predominantly in the negative sector (field directed towards the Sun). Similar conditions can be expected in the next 24 hours.

Geomagnetism

During the last 24 hours the geomagnetic conditions were quiet to unsettled (NOAA KP 1-2, K Bel 1-3). Similar conditions can be expected for the next 24 hours.

Proton flux levels

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

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It is expected to remain so in the next 24 hours. The 24 hour electron fluence was at normal levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 087, based on 13 stations.

Solar indices for 23 Aug 2023

Wolf number Catania	106
10cm solar flux	147
AK Chambon La Forêt	007
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	105 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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