Vaata esmaspäev, 27 veebruar 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Feb 27 1250 UTC

SIDC Forecast

Päikesepursked ehk loited

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

Geomagnetism

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

Päikese prootonid

Quiet

	10cm flux	Ap
27 Feb 2017	078	007
28 Feb 2017	077	010
01 Mar 2017	076	016

Bulletin

Solar activity was very low with no C class flares. NOAA active regions (ARs) 2638, 2639 and 2640 were stable. 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 is expected to become geoeffective around midnight 28-Feb-2017/01-March-2017. Proton flux values are expected to remain at background levels. Solar wind speed declined from around 450 km/s to around 350 km/s. Total magnetic field was in the 3:6nT range. Bz was in the -3:4nT range. Solar wind is expected to be at nominal levels over the next 24 hours before an anticipated increase late 28-Feb-2017 due to high speed stream from the negative polarity coronal hole. Geomagnetic conditions have been quiet (local K Dourbes 0-2, 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 28-Feb 2017 with the anticipated high speed stream.

Today's estimated international sunspot number (ISN): 041, based on 18 stations.

Solar indices for 26 Feb 2017

Wolf number Catania	///
10cm solar flux	079
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	001
Estimated international sunspot number	032 - Based on 19 stations

Noticeable events summary

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

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