Vaata neljapäev, 7 detsember 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Dec 07 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 07 Dec 2017 until 09 Dec 2017
Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
07 Dec 2017070008
08 Dec 2017072007
09 Dec 2017072007

Bulletin

The solar activity remained quiet over the past 24 hours. No C-class flare and above have been recorded. The bipolar sunspot (Catania sunspot group 65, NOAA Active Region 2690) has produced one small B-class flare. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The greater than 10 MeV solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

The Earth remained under the influence of the solar wind stream associated with the Coronal Hole (which has crossed the central meridian on Dec 01). The wind speed has gradually decreased from 550 km/s to 500 km/s. The interplanetary magnetic field magnitude remained below 6 nT, and the Bz component fluctuated between -5 and 5 nT. The solar wind conditions are expected to continue to decline and return to nominal conditions.

Geomagnetic conditions were quiet to unsettle (local K Dourbes 1-3, NOAA Kp 2-3) due to the solar wind stream associated with the Coronal Hole. The conditions are expected to return to the nominal level as the solar wind is declining.

Today's estimated international sunspot number (ISN): 010, based on 10 stations.

Solar indices for 06 Dec 2017

Wolf number Catania013
10cm solar flux068
AK Chambon La Forêt019
AK Wingst016
Estimated Ap017
Estimated international sunspot number013 - Based on 13 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

Kõik ajad UTC-s

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