Viewing archive of Saturday, 26 August 2023

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2023 Aug 26 1231 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
26 Aug 2023	139	008
27 Aug 2023	140	010
28 Aug 2023	141	007

Solar Active Regions and flaring

There are six active regions visible on the disk. NOAA AR 3415 has evolved into a beta-delta magnetic field configuration, it is capable of producing M-class flares. The rest of the active regions have simple alpha or beta magnetic field configuration. Only C-class flaring has been observed in the last 24 hours, with the strongest one being a C5.0 one, from AR 3405 peaking at 15:49 UTC. C-class flares are expected and M-class flares are possible.

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 solar wind arriving to the Earth is slow, with speeds around 400 km/s and interplanetary magnetic field around 8 nt. The CME from 22 August may arrive to the Earth today (although it has low chances of doing so), otherwise, similar slow wind conditions can be expected in the next 24 hours.

Geomagnetism

During the last 24 hours the geomagnetic conditions have been quiet (NOAA KP 1-2, K Bel 1-2). Mostly quiet to unsettled conditions can be expected for the next 24 hours, with possible active periods (in particular if the CME from 22 August arrives to the Earth, this has low chances of happening).

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 17 stations.

Solar indices for 25 Aug 2023

Wolf number Catania	///
10cm solar flux	139
AK Chambon La Forêt	008
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	089 - 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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