Viewing archive of Sunday, 10 January 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Jan 10 1231 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
10 Jan 2021	075	010
11 Jan 2021	076	015
12 Jan 2021	076	007

Bulletin

Solar X-ray flux remained below background (B) level. With no active regions on disc, solar flaring activity is expected to be very low.

There are no Earth directed CMEs observed in coronagraph data.

The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux remained below the 1000 pfu event threshold and is expected to remain below that threshold over the next 24 hours. The 24h electron fluence was at nominal levels and expected to be nominal over the next days.

Solar wind values reflected background slow Solar wind conditions. Solar wind speed was mostly in the 300-330 km/s range. The interplanetary magnetic field was around 5nT (3.5-7nT), with a variable Bz component not reaching below -3nT. The magnetic field phi angle was stable in the negative sector (towards the Sun). Today a switch into the positive sector (away from the Sun) is expected and some increase in Solar wind conditions related to a positive polarity coronal hole is likely.

Geomagnetic condition were quiet (NOAA Kp 0-1 and local K Dourbes 0-2). An increase to unsettled conditions is expected with also an isolated active period not excluded.

Today's estimated international sunspot number (ISN): 000, based on 15 stations.

Solar indices for 09 Jan 2021

Wolf number Catania	///
10cm solar flux	074
AK Chambon La Forêt	005
AK Wingst	///
Estimated Ap	002
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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