Prohlížíte si archiv pátek 10. ledna 2020

Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2020 Jan 10 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Proton event expected (10 pfu at >10 MeV)

	10cm flux	Ap
10 Jan 2020	074	008
11 Jan 2020	074	007
12 Jan 2020	074	007

Bulletin

The solar activity has been at low levels over the past 24 hours. Two small bipolar sunspots are currently visible on the disc: Catania sunspots group 26 (NOAA AR-2756) in the North-West quadrant of the Sun, and Catania sunspot group 27, whish is the region close to the equator that turned over the East limb on Jan 07 and produced a narrow coronal mass ejection. No significant flaring activity has been observed in these regions and the X-ray flux remained below C-level. The solar activity is expected to remain at low levels with a small chances of C-class flare and possibly slow coronal mass ejections for the next 24 hours.

No earth-directed coronal mass ejection was identified in the available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal values.

The solar wind environment near Earth was under the influence of the coronal hole high-speed streams. The solar wind speed increased from 400 km/s to about 590 km/s, the total magnetic field fluctuated between 2 nT and 7.6 nT, and the southern component of the magnetic filed was between -6 nT and 5.3 nT (as recorded by the ACE spacecraft). Currently the solar wind speed is decreasing and ranges around 500 km/s. We expect the solar wind parameters to return slowly towards an ambient background and slow solar wind speed regime in the next two days. An extension to the North Polar coronal hole (positive polarity), and a positive polarity equatorial coronal hole reached the central meridian today. The high-speed stream coming from those two coronal holes is expected to enhance the solar wind environment near Earth in more than 2-3 days from now.

Quiet to unsettled geomagnetic conditions were observed in response to the solar wind enhancement. Quiet to unsettle conditions is expected for the next 24 hours.

Today's estimated international sunspot number (ISN): 000, based on 16 stations.

Solar indices for 09 Jan 2020

Wolf number Catania	016
10cm solar flux	074
AK Chambon La Forêt	016
AK Wingst	012
Estimated Ap	012
Estimated international sunspot number	015 - Based on 18 stations

Noticeable events summary

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

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