Viewing archive of Wednesday, 21 March 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Mar 21 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 21 Mar 2018 until 23 Mar 2018
Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

10cm fluxAp
21 Mar 2018068003
22 Mar 2018068011
23 Mar 2018067010

Bulletin

Solar activity was at very low levels. The Sun is spotless. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Earth has left the coronal hole (CH) wind stream. Current solar wind parameters are at nominal levels. Solar wind speed decreased from 450 km/s to 330 km/s, and Bz varied mostly between -3 and +3 nT (DSCOVR). The interplanetary magnetic field was directed mostly away from the Sun before midnight, and mostly towards the Sun after midnight. Geomagnetic activity was at quiet levels.

Over the next few days, quiet to unsettled geomagnetic conditions are expected with a chance on an active episode from wind streams associated with the patchy equatorial CHs. The chance on an isolated minor storming interval is likely to increase by 24-25 March with the expected arrival of the wind stream related to the more prominent trailing extension of the southern polar CH.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 20 Mar 2018

Wolf number Catania000
10cm solar flux069
AK Chambon La Forêt010
AK Wingst008
Estimated Ap008
Estimated international sunspot number000 - Based on 31 stations

Noticeable events summary

DayBeginMaxEndLocStrengthOP10cmCatania/NOAARadio burst types
None

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

All times in UTC

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