Viewing archive of Thursday, 29 March 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Mar 29 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 29 Mar 2018 until 31 Mar 2018
Solar flares

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Solar protons

Quiet

10cm fluxAp
29 Mar 2018070016
30 Mar 2018070017
31 Mar 2018070016

Bulletin

There are no sunspot regions on the visible hemisphere of the Sun but the loops of a far side active region are rotating into view at the East limb. Flaring level is very low. The chance for a C flare in the next 24 hours is estimated at 10%, mainly from the region behind the East limb.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours.

Solar wind speed measured by DSCOVR further decreased from about 430 to 340 km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was predominantly directed towards the Sun and its magnitude varied between about 0 and 6 nT. There were no prolonged intervals with Bz below -5 nT.

Quiet geomagnetic conditions (K Dourbes between 0 and 2; NOAA Kp between 0 and 1) were registered in the past 24 hours. Due to the expected arrival of a high speed stream from a positive polarity, northern polar coronal hole, active geomagnetic levels (K Dourbes = 4) are possible on March 29, 30 and 31, with a chance for minor storm intervals (K Dourbes = 5).

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

Solar indices for 28 Mar 2018

Wolf number Catania000
10cm solar flux069
AK Chambon La Forêt004
AK Wingst002
Estimated Ap002
Estimated international sunspot number000 - Based on 15 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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