Viewing archive of Sunday, 28 November 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Nov 28 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
28 Nov 2021	092	015
29 Nov 2021	093	007
30 Nov 2021	094	007

Bulletin

Three active regions visible on the Sun (beta magnetic field configuration). There have been no C-class flares in the past 24 hours, but the regions have grown in size, elevating the X-ray background. As a result, C-class flares can be expected in the next 24 hours.

No Earth directed CMEs were observed in the past 24 hours.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron fluence was at normal levels in the past 24 hours, and is expected to stay at normal levels in the next 24 hours.

A shock from the 24 November CME arrived to DSCOVR at 21:50 UT on 27 November. The magnetic field jumped from 6 nT to 13 nT (reaching 17 nT later) and the speed from 300 km/s to 380 km/s. The bulk of the ICME seems to have passed south of the Earth and its effect was weak. Bz reached -16 nT, but only briefly, with V around 400 km/s. This led to only unsettled geomagnetic conditions (K-BEL and Kp up to 3). The magnetic field is still relatively elevated (around 10 nT), more unsettled conditions can be expected (with possible active periods) in the next 24 hours.

Today's estimated international sunspot number (ISN): 045, based on 08 stations.

Solar indices for 27 Nov 2021

Wolf number Catania	///
10cm solar flux	092
AK Chambon La Forêt	013
AK Wingst	003
Estimated Ap	004
Estimated international sunspot number	038 - Based on 23 stations

Noticeable events summary

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

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