Vaata teisipäev, 25 aprill 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Apr 25 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 25 Apr 2017 until 27 Apr 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
25 Apr 2017081014
26 Apr 2017079014
27 Apr 2017078008

Bulletin

There are three active regions, all with the simple configuration of the photospheric magnetic field, presently observed on the visible side of the solar disc. Solar activity is low with five low B-class and no C-class flares reported during last 24 hours. We do not expect change in the solar activity, and although C-class flares are possible, they are not very probable. No Earth directed CMEs have been observed and the solar protons remained at background level in the past 24 hours.

The solar wind speed is slowly decreasing and it presently amounts 600 km/s. The interplanetary magnetic field magnitude is about 5nT. Due to the influence of the fast solar wind, several intervals of the active conditions were reported during last 24 hours (Dourbes reported K=4 and NOAA Kp=4). The geomagnetic conditions are presently unsettled to active and we expect them to stay so in the coming hours.

Today's estimated international sunspot number (ISN): 041, based on 20 stations.

Solar indices for 24 Apr 2017

Wolf number Catania050
10cm solar flux080
AK Chambon La Forêt028
AK Wingst020
Estimated Ap024
Estimated international sunspot number046 - Based on 28 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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