Перегляд архіву четвер, 13 лютого 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2020 Feb 13 1231 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

Quiet (A<20 and K<4)

Сонячні протони

Quiet

	10cm flux	Ap
13 Feb 2020	071	004
14 Feb 2020	071	007
15 Feb 2020	071	007

Bulletin

The solar activity has been quiet over the past 24 hours. The visible solar disc is spotless and the X-ray flux is below B-level. The solar activity is expected to remain at low levels over the next 24 hours.

No earth-directed coronal mass ejections (CMEs) have been observed in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

The solar wind parameters returned to nominal levels: the wind speed decreased from 420 km/s to 320 km/s, the total interplanetary magnetic fields was below 6 nT, and the southward magnetic component fluctuated between -2.0 nT and 5.0 nT. The solar wind conditions are expected to remain globally at background levels for the next 24-hour period. We anticipate possible mild enhancement of the solar wind parameters later today or tomorrow due to the solar wind coming from the small equatorial coronal hole (negative polarity) that reached the central meridian on February 9.

The geomagnetic conditions were quiet and are expected to remain mostly quiet.

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

Solar indices for 12 Feb 2020

Wolf number Catania	000
10cm solar flux	072
AK Chambon La Forêt	005
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

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