Vaata pühapäev, 26 veebruar 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Feb 26 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 26 Feb 2017 until 28 Feb 2017
Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
26 Feb 2017079005
27 Feb 2017078007
28 Feb 2017077014

Bulletin

Solar activity was very low with no significant flaring and X-ray flux at background values. NOAA region 2638 (Catania 95 and 96) and NOAA region 2639 (Catania 97) were stable. Additional spot formation was recorded in Catania group 98 (now numbered as NOAA region 2640). X-ray flux is expected to remain at background level. No Earth directed CMEs have been recorded in coronagraph data. The transequatorial extension of the negative polarity southern polar coronal hole has transited the central meridian overnight. It is expected to become geoeffective around midnight February 28 / March 1. Proton flux values are at background levels and expected to remain so.

Solar wind showed the continued recovery towards nominal conditions. Solar wind speed declined from around 500 km/s to around 430 km/s. Total magnetic field was in the 3-5nT range. Solar wind is expected to be at nominal levels over the next 48 hours before an anticipated increase late February 28 due to high speed stream from the negative polarity coronal hole. Geomagnetic conditions have been quiet to unsettled (local K Dourbes 0-3, NOAA Kp 1-2). Over the next days, geomagnetic conditions are expected to be quiet to unsettled and increasing to quiet to active by late February 28 with the anticipated high speed stream.

Today's estimated international sunspot number (ISN): 033, based on 09 stations.

Solar indices for 25 Feb 2017

Wolf number Catania///
10cm solar flux080
AK Chambon La Forêt009
AK Wingst008
Estimated Ap008
Estimated international sunspot number030 - Based on 26 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

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