Viewing archive of Friday, 5 January 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jan 05 1342 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
05 Jan 2018	070	003
06 Jan 2018	071	004
07 Jan 2018	070	004

Bulletin

The solar activity was quiet over the past 24 hours and no flare has been recorded. A small sunspot has recently emerged (NOAA active region 2693) on the north-west quadrant of the visible disc. Quiet flaring conditions are expected for the next 24-hour period with possible but not very likely C-class flares from the newly emerged sunspot.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The Earth was within the slow solar wind speed regime over the past 24 hours. The solar wind speed was ranging between 350 and 400 km/s. The interplanetary magnetic field magnitude was below 5 nT, and the Bz component was ranging from -4 to 4 nT. A northern polar coronal hole extending down to latitude 20 degrees is currently facing Earth. Solar wind enhancements and high speed streams associated with the coronal hole are not expected to arrive before Jan 08.

The geomagnetic conditions were quiet and it is expected to remain quiet as the Earth is within the slow solar wind speed stream. Disturbance of the geomagnetic conditions are anticipated on Jan 08 due to the arrival of the high speed streams associated with the coronal hole.

Today's estimated international sunspot number (ISN): 011, based on 09 stations.

Solar indices for 04 Jan 2018

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	007
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	013 - Based on 15 stations

Noticeable events summary

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

All times in UTC

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