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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2023 Oct 29 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Protoni solari

Quiet

	10cm flux	Ap
29 Oct 2023	128	024
30 Oct 2023	129	022
31 Oct 2023	130	013

Solar Active Regions and flaring

The solar flaring activity was at low levels, with several C-class flares recorded in the past 24 hours. The largest flare was a C6.6 flare, peaking at 11:43 UTC on Oct 29. The flare was associated with NOAA AR 3474 (beta-gamma class), which produced most of the flaring activity over the period. Low flaring activity was also produced by NOAA AR 3471. Other regions on the disc have simple configuration of their photospheric magnetic field (beta class) and did not show any significant flaring activity. The solar flaring activity is expected to be at low level over the next 24 hours with C-class flares likely and a low chance for isolated M-class flares.

Espulsioni di massa coronale

No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery.

Vento solare

Over the past 24 hours the solar wind parameters (ACE and DSCOVR) reflected the ongoing influence of the high-speed stream. The solar wind speed increased to values around 650 km/s. The interplanetary magnetic field magnitude decreased from about 12 nT to current values below 8 nT. The southward component of the interplanetary magnetic field fluctuated between -9 nT and 7 nT. The magnetic field orientation was predominantly in the positive sector (field directed away from the Sun). Solar wind speed is expected to remain elevated for the next day with the ongoing high-speed stream influence.

Geomagnetism

During the last 24 hours the geomagnetic conditions reached minor storm conditions globally and active conditions locally (NOAA KP: 3 to 5- and K Bel: 2 to 4). Mostly unsettled to active geomagnetic conditions are expected for the next 24 hours with chances for isolated minor to moderate storm periods due to HSS influence.

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 days.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It may cross the threshold over the next days due to the enhanced solar wind conditions. The 24 hour electron fluence was at normal levels and is expected to remain so.

Today's estimated international sunspot number (ISN): 059, based on 09 stations.

Solar indices for 28 Oct 2023

Wolf number Catania	///
10cm solar flux	128
AK Chambon La Forêt	033
AK Wingst	016
Estimated Ap	018
Estimated international sunspot number	057 - Based on 17 stations

Noticeable events summary

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

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