Vaata reede, 7 aprill 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Apr 07 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 07 Apr 2017 until 09 Apr 2017
Päikesepursked ehk loited

C-class flares expected, (probability >=50%)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
07 Apr 2017072008
08 Apr 2017070005
09 Apr 2017072009

Bulletin

Solar activity was at low levels during the period. Two C-class flares were recorded: a C5.5 flare at the very beginning of the period (12:10UT), and a C2.7 event peaking at 00:25UT. Both flares originated from NOAA 2645's trailing portion, which is now very close to the west limb. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

C-class flaring remains possible, with a small chance on an isolated M-class flare.

Solar wind speed gradually decreased from an initial 490 km/s to 420 km/s by the end of the period. Bz fluctuated between -5 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun. The particle stream from a narrow extension from the positive polar coronal hole may affect the earth environment on 9 or 10 April.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so, with only a small chance on an isolated active episode.

Today's estimated international sunspot number (ISN): 027, based on 16 stations.

Solar indices for 06 Apr 2017

Wolf number Catania044
10cm solar flux076
AK Chambon La Forêt014
AK Wingst009
Estimated Ap008
Estimated international sunspot number037 - Based on 27 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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