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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2019 Feb 17 1231 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
17 Feb 2019	071	002
18 Feb 2019	072	004
19 Feb 2019	072	009

Bulletin

The solar activity has been quiet over the past 24 hours, with the X-ray flux remaining below B-class level. The large plage region is still present in the north-east quadrant of the solar disk with a filament observed across it. Quiet conditions are expected to continue over the next 24 hours.

No Earth directed Coronal Mass Ejections (CMEs) have been detected in coronagraph images. The greater than 10MeV proton flux remained at background levels over the past 24 hours and is expected to remain so.

Over the last 24 hours the solar wind has continued to return to nominal values, decreasing from approximately 390 to 320 km/s. The total magnetic field strength fluctuated around 4 nT, while the Bz component fluctuated between -4 and 2.5 nT. The phi angle was negative at the start of the period but changed to become predominantly positive at 14:00 UT. The ambient background solar wind conditions are expected to continue over the next 24 hours.

The geomagnetic conditions were quiet to unsettled over the last 24 hours, with the Kp (NOAA) and the local K (Dourbes) indices ranging between 0-2 and 0-3, respectively. The geomagnetic conditions are expected to continue to be quiet over the next 24 hours, with the possibility for unsettled conditions from the 19th due to the influence of the positive polarity coronal hole, which passed the central meridian on the 16th of February.

Today's estimated international sunspot number (ISN): 000, based on 24 stations.

Solar indices for 16 Feb 2019

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	006
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	000 - Based on 31 stations

Noticeable events summary

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

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