Viewing archive of Monday, 28 November 2022

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2022 Nov 28 1237 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
28 Nov 2022	106	018
29 Nov 2022	105	021
30 Nov 2022	105	022

Bulletin

The solar flaring activity was at very low levels with only B-class flares reported in the past 24 hours. NOAA ARs 3151 and 3152, the two largest regions on disk (magnetic type beta), have shown some minor growth but produced only B-class flares. Solar flaring activity is expected to be at very low levels, with a low chance of C-class flares.

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

In the past 24 hours the greater than 10 MeV proton flux was below the minor-storm warning threshold and is expected to remain so. The greater than 2 MeV electron flux crossed the 1000 pfu threshold during the last 24 hours. The 24h electron fluence was at normal to moderate levels over the past 24 hours before decreasing again. The 24h electron fluence is expected to be at normal levels in the next 24 hours.

On November 28, a large trans-equatorial positive polarity coronal hole began to transit the central meridian.

The solar wind parameters reflected the influence of a high-speed stream. The solar wind speed increased from 400 to 620 km/s. The interplanetary magnetic field magnitude gradually increased from 5 to above 10 nT. The magnetic field orientation was predominantly in the positive sector (field directed away from the Sun). The solar wind speed is expected to continue to be enhanced over the next days, due to the ongoing influence of the high-speed streams associated with multiple positive polarity coronal holes.

Geomagnetic conditions were active, with an isolated interval of minor storm conditions globally, (NOAA Kp 2-5, local K-Dourbes 1-4). Geomagnetic conditions are expected to be unsettled to active on Nov 28 to Nov 30, with further intervals of minor storm conditions possible as the current high- speed stream continues to influence the Earth and further enhancements are expected.

Today's estimated international sunspot number (ISN): 055, based on 10 stations.

Solar indices for 27 Nov 2022

Wolf number Catania	///
10cm solar flux	///
AK Chambon La Forêt	036
AK Wingst	019
Estimated Ap	018
Estimated international sunspot number	063 - Based on 17 stations

Noticeable events summary

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

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