Vaata neljapäev, 6 veebruar 2020 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2020 Feb 06 1231 UTC

SIDC Forecast

Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

	10cm flux	Ap
06 Feb 2020	071	017
07 Feb 2020	071	015
08 Feb 2020	071	007

Bulletin

X-ray flux remained below B level throughout the period. The Sun is spotless and no flaring is expected.

No Earth-directed CMEs have been observed in coronagraph data.

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

Solar wind showed the expected enhancements under the influence of a high speed stream from an extension of the southern polar coronal hole. Since midnight, Solar wind speed increased from 350km/s to 460 km/s. Total magnetic field reached a peak value of 11nT in the compression region, with Bz around -10nT for a while. The magnetic field phi angle was in the negative sector throughout the period. Solar wind speed is expected to rise further to a maximum of between 500-600 km/s over the next 24 hours before starting a slow return to background values.

Geomagnetic conditions reached active levels (NOAA Kp=5 for the 6-9UT period, while local K Dourbes remained 0-3). Unsettled to active conditions are expected over the next 24 hours before returning to quiet to unsettled conditions.

Today's estimated international sunspot number (ISN): 000, based on 18 stations.

Solar indices for 05 Feb 2020

Wolf number Catania	///
10cm solar flux	071
AK Chambon La Forêt	008
AK Wingst	005
Estimated Ap	004
Estimated international sunspot number	000 - Based on 26 stations

Noticeable events summary

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

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