Viewing archive of Sunday, 17 June 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Jun 17 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
17 Jun 2018	071	007
18 Jun 2018	071	010
19 Jun 2018	071	016

Bulletin

Solar activity was very low with X-ray flux remaining below B level. Catania sunspot group 86 (NOAA active region 2713) almost fully decayed. Chances for C class flaring remain very low.

No Earth directed CMEs were observed in coronagraph images.

Solar proton flux levels were at background values and are expected to remain so.

Solar wind conditions have been nominal with solar wind speed around 300 km/s and total magnetic field below 5 nT. The Bz component of the magnetic field was variable. The magnetic field phi angle indicates a negative sector connection. Solar wind conditions are expected to remain nominal in the next 24 hours with afterwards an expected sector change and a moderate increase in solar wind speed associated to the positive polarity coronal hole in the northern hemisphere that has passed the central meridian June 14-15.

Geomagnetic conditions were quiet to unsettled (local K Dourbes 0-3 and NOAA Kp 0-1) and are expected to first be quiet and later quiet to unsettled as solar wind speed becomes slightly increased.

Today's estimated international sunspot number (ISN): 014, based on 11 stations.

Solar indices for 16 Jun 2018

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	006
AK Wingst	///
Estimated Ap	003
Estimated international sunspot number	015 - Based on 21 stations

Noticeable events summary

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

All times in UTC

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