Viewing archive of Tuesday, 9 February 2021

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2021 Feb 09 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
09 Feb 2021	073	007
10 Feb 2021	073	006
11 Feb 2021	073	004

Bulletin

Solar activity was at very low levels. There were no numbered sunspots on the solar disc and no significant flares were detected in the last 24 hours. The flaring activity is expected to remain low in the next 24 hours.

No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours and is expected to remain so in the next 24 hours. The greater than 2MeV electron flux remained under the 1000 pfu threshold and is expected to remain so in the next 48 hours. The 24h electron fluence was at normal levels and is expected to remain so in the next 48 hours.

Over the past 24 hours the solar wind conditions (ACE and DSCOVR) were enhanced under the ongoing influence of a HSS related to a patchy positive polarity coronal hole. The total magnetic field varied between 2.4 nT an 7.5 nT, while the Bz component oscillated between -7.3 nT and 6.1 nT. The phi angle remained predominantly in the positive sector. The solar wind speed started around 400 km/s and sporadically increased to 518 km/s.

The geomagnetic conditions over the past 24 hours were predominantly quiet with an isolated 3-hour long period of globally and locally unsettled conditions. Quiet to unsettled conditions are expected for the next 24 hours. Isolated active periods remain possible as the influence of the coronal hole HSS wanes.

Today's estimated international sunspot number (ISN): 004, based on 12 stations.

Solar indices for 08 Feb 2021

Wolf number Catania	000
10cm solar flux	074
AK Chambon La Forêt	///
AK Wingst	///
Estimated Ap	007
Estimated international sunspot number	003 - Based on 16 stations

Noticeable events summary

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

All times in UTC

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