Vaata kolmapäev, 26 aprill 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Apr 26 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 26 Apr 2017 until 28 Apr 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 Apr 2017081012
27 Apr 2017080012
28 Apr 2017079009

Bulletin

Solar activity remains to be low with no C-class flares and only one B-class flare reported during last 24 hours. The B7.2 flare, peaked at 20:25 UT on April 25, originated from the NOAA AR 2651. We expect occasional B-class flares and possibly, but not very probably, isolated low C-class flare in the coming hours. Newly arrived data indicate that the angular width of the CME, associated with the filament eruption observed on April 24 at about 02:00 UT, was about 120 degrees. However, since the bulk of the CME mass was directed mostly northward of the Sun-Earth line it is very improbable that this CME will arrive at the Earth. No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The Earth is still inside the fast solar wind, but the solar wind speed continues to decrease and it presently amounts 530 km/s. The interplanetary magnetic field magnitude is stable, having value of about 5nT. The geomagnetic conditions are presently quiet to unsettled we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 040, based on 19 stations.

Solar indices for 25 Apr 2017

Wolf number Catania///
10cm solar flux081
AK Chambon La Forêt019
AK Wingst015
Estimated Ap015
Estimated international sunspot number042 - Based on 32 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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