Viewing archive of Sunday, 4 December 2022

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2022 Dec 04 1237 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
04 Dec 2022	140	010
05 Dec 2022	145	006
06 Dec 2022	148	010

Bulletin

The solar flaring activity was at moderate levels. The largest flare was an impulsive M1.2 flare, peaking at 17:45 UT, associated with newly numbered region NOAA AR 3157 near the northeast limb. This event was also associated with a Type II radio emission. New region, NOAA AR 3158, emerged in the northern hemisphere but remains simple and has been inactive. Catania sunspot groups 8 and 11 (NOAA ARs 3153 and 3156) produced low level C-class flares. Catania sunspot group 9 (NOAA ARs 3155) showed some flux emergence. Catania sunspot group 7 (NOAA AR 3154) decayed and was inactive. Solar flaring activity is expected to be at low levels, with C-class flares likely and a chance for M-class flares.

No Earth directed 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 exceeded the 1000 pfu threshold during the last 24 hours. The electron flux is expected to continue to exceed this threshold over the next day. The 24h electron fluence was at moderate to high levels. The 24h electron fluence is expected to be at moderate to high levels in the next 24 hours.

On December 04, a large trans-equatorial negative polarity coronal hole began to transit the central meridian.

The solar wind conditions reflected the waning influence of the high-speed stream. The solar wind speed ranged between 570 km/s and 490 km/s. The interplanetary magnetic field magnitude ranged between 1 and 7 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 gradually decrease over the next 24 hours.

Geomagnetic conditions were quiet to unsettled (NOAA KP 2-3 and Local K Dourbes 2-3). Geomagnetic conditions are expected to be at quiet to unsettled levels over the next day.

Today's estimated international sunspot number (ISN): 110, based on 03 stations.

Solar indices for 03 Dec 2022

Wolf number Catania	///
10cm solar flux	134
AK Chambon La Forêt	015
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	093 - Based on 06 stations

Noticeable events summary

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

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