Viewing archive of Wednesday, 20 November 2024

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2024 Nov 20 1234 UTC

SIDC Forecast

Solar flares

M-class flares expected (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
20 Nov 2024	160	010
21 Nov 2024	163	009
22 Nov 2024	165	011

Solar Active Regions and flaring

Solar flaring activity was low over the past 24 hours. The largest flare was a C9.0 flare (SIDC Flare 2659) peaking on November 19 at 17:28 UTC, which was produced by SIDC Sunspot Group 298 (NOAA Active Regions 3901). This region was the most active along with SIDC Sunspot Group 316 (NOAA Active Region 3897), which exhibited strong flux emergence, but is now rotating over the west limb. SIDC Sunspot Group 318 (NOAA Active Region 3898) currently located at S17W11 continued to develop and increase in size over the period and has a Beta magnetic configuration. The solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely and a chance for X-class flares.

Coronal mass ejections

No Earth-directed coronal mass ejections (CMEs) have been detected in the available coronagraph imagery over the past 24 hours.

Coronal holes

SIDC Coronal Hole 80 (mid-latitude coronal hole with a negative polarity) has begun to cross the central meridian on November 20.

Solar wind

Over the past 24 hours the solar wind conditions predominantly reflected a slow solar wind regime. The interplanetary magnetic field continued to be slightly elevated, ranging between 2 and 13nT, with a minimum Bz of -10 nT. The solar wind speed ranged between 350 km/s and 420 km/s. The interplanetary magnetic field phi angle remained predominantly in the positive sector (directed away from the Sun). Slow solar wind conditions are expected to continue over the next 24 hours.

Geomagnetism

The geomagnetic conditions over the past 24 hours were quiet to unsettled, with one local isolated active period (Local K Bel = 4). Quiet to unsettled geomagnetic conditions are expected for the next 24 hours.

Proton flux levels

Over the past 24 hours the greater than 10 MeV GOES proton flux was below the 10 pfu threshold. The greater than 10 MeV GOES proton flux is expected to continue to be below this threshold over the 24 hours.

Electron fluxes at geostationary orbit

The greater than 2 MeV electron flux as measured by GOES 18 was slightly elevated but remained below the 1000 pfu threshold briefly and is expected to remain below this threshold over the next 24 hours. The 24h electron fluence was at nominal levels and is expected to remain so in the next 24 hours.

Today's estimated international sunspot number (ISN): 119, based on 10 stations.

Solar indices for 19 Nov 2024

Wolf number Catania	138
10cm solar flux	157
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	120 - Based on 08 stations

Noticeable events summary

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

All times in UTC

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