Viewing archive of Tuesday, 21 January 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2020 Jan 21 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
21 Jan 2020	070	007
22 Jan 2020	070	004
23 Jan 2020	071	004

Bulletin

Solar activity was at very low levels. No significant flares have been recorded. No Earth directed Coronal Mass Ejections (CMEs) have been detected. There was no CME observed in coronagraphic observations associated with the event previously reported at 18:30 UT Jan 19. The greater than 10 MeV proton flux was at nominal values. Solar activity is expected to remain at very low levels.

The solar wind speed fluctuated between 270 and 320 km/s (ACE). The interplanetary magnetic field (phi angle) was predominantly directed towards the Sun (negative sector). Bz varied between -3 and +8 nT. The total magnetic field oscillated around 3 nT for much of period, then showed an increasing trend from 9 UT Jan 21 reaching a maximum of around 8 nT at 12 UT.

Geomagnetic activity was quiet, with the Kp index (NOAA) and the local k index (Dourbes) recording values of between 0-1. Mostly quiet conditions are expected on Jan 21-23, with possible unsettled periods on Jan 21-22, due to the influence from the patchy negative polarity coronal hole that traversed the central meridian on Jan 16.

Today's estimated international sunspot number (ISN): 000, based on 17 stations.

Solar indices for 20 Jan 2020

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	003
AK Wingst	001
Estimated Ap	001
Estimated international sunspot number	000 - Based on 17 stations

Noticeable events summary

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

All times in UTC

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