Viewing archive of Sunday, 13 December 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2020 Dec 13 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
13 Dec 2020	081	007
14 Dec 2020	081	007
15 Dec 2020	081	007

Bulletin

NOAA AR 2790 (alpha) is rotating out of view over the west limb, NOAA AR 2792 (beta) rotated into view from the east one. They did not produce any C-class flares or larger in the past 24 hours. But they produced several B-class flares. C-class flares are possible in the next 24 h.

No Earth directed CMEs were seen in the last 24 hours.

The greater than 10 MeV proton flux is at background levels and is expected to remain at background levels. The greater than 2MeV electron flux did not exceed the 1000 pfu alert threshold, it is expected to remain so in the next 24 hours. The 24h electron fluence was at moderate levels, it is expected to remain so in the next 24 hours

The solar wind speed ranged from 425 km/s to 375 km/s with interplanetary magnetic field magnitude around 5 nT, in the past 24 hours. The magnetic field polarity is negative, pointing towards the Sun. Bz was never below -5 nT.

Geomagnetic conditions were quiet to unsettled (K Dourbes 0-3 and Kp 0-3). Geomagnetic conditions are expected to remain quiet.

Today's estimated international sunspot number (ISN): 011, based on 12 stations.

Solar indices for 12 Dec 2020

Wolf number Catania	///
10cm solar flux	082
AK Chambon La Forêt	010
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	010 - Based on 08 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page