Vaata laupäev, 18 veebruar 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Feb 18 1923 UTC

SIDC Forecast

Valid from 1230 UTC, 18 Feb 2017 until 20 Feb 2017
Päikesepursked ehk loited

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Päikese prootonid

Quiet

10cm fluxAp
18 Feb 2017075013
19 Feb 2017076031
20 Feb 2017078019

Bulletin

Solar conditions have been quiet with X-ray flux at background levels. Catania group 93 (NOAA 2636) decayed slightly while a new region is appearing at the North Eastern limb. There is only a slight chance for C flares. No Earth directed CMEs have been observed in coronagraph data. Proton flux values are at background levels and expected to remain so.

Solar wind conditions remained enhanced under the positive polarity coronal hole influence. Solar wind speed saw a peak close to 600 km/s while magnetic field was in the 4-9nT range with a period of sustained negative Bz (down to -7nT) around midnight. Enhanced solar wind conditions will continue over the next days. Geomagnetic conditions were quiet to active (both NOAA Kp and local K Dourbes 1-4), with the active periods around midnight associated to the negative Bz values. Periods of active geomagnetic conditions remain possible over the next days.

Today's estimated international sunspot number (ISN): 011, based on 17 stations.

Solar indices for 17 Feb 2017

Wolf number Catania012
10cm solar flux075
AK Chambon La Forêt038
AK Wingst022
Estimated Ap023
Estimated international sunspot number013 - Based on 20 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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