Vaata pühapäev, 9 aprill 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Apr 09 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 09 Apr 2017 until 11 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
09 Apr 2017074020
10 Apr 2017073013
11 Apr 2017073014

Bulletin

Solar activity was at very low levels during the period. Low-level B-class flaring was observed from NOAA 2645 (B4.9) from behind the west limb, and from a new, but small sunspot region at the east limb (B3.6). No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Quiet flaring conditions are expected, with a chance on an isolated C-class flare.

Earth was under the influence of coronal hole wind streams. Solar wind speed reached a maximum near 630 km/s around 15:45UT, before starting a gradual decline to end the period near values of 460 km/s. Bz fluctuated between -6 and +6 nT, being mostly negative after 20UT. The interplanetary magnetic field was initially directed towards the Sun, but changed to a mostly away direction after 22:30UT.

The geomagnetic field was at quiet to active levels, with a minor storming episode (Kp=5) during the 03-06UT interval. Local geomagnetic data were missing for the period, but Potsdam reported mostly active conditions. The geomagnetic field is expected to be at quiet to active levels, with a chance on another minor storming episode.

Today's estimated international sunspot number (ISN): 000, based on 19 stations.

Solar indices for 08 Apr 2017

Wolf number Catania///
10cm solar flux073
AK Chambon La Forêt028
AK Wingst020
Estimated Ap019
Estimated international sunspot number000 - Based on 33 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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