Vaata pühapäev, 24 detsember 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Dec 24 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 24 Dec 2017 until 26 Dec 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
24 Dec 2017076023
25 Dec 2017076031
26 Dec 2017075013

Bulletin

Solar activity was very low with X-ray flux remaining below B level, apart from a single B1 flare from the only region on disk (Catania group 67, NOAA active region 2692). There is a relatively small chance for C -flaring over the next days. Around 18:00 UT a filament eruption was visible in the North Eastern quadrant. Coronagraph images do not reveal any associated CME signatures. No Earth directed CMEs were recorded in coronagraph images. Proton flux levels are at background values and expected to remain so.

Solar wind showed the expected arrival of the high speed stream from the equatorial negative polarity coronal hole. Solar wind speed first increased to 400 km/s but then declined again in the afternoon of December 23. Since midnight it is increasing again to close to 500 km/s currently. Total magnetic field in the compression region measured mostly in the 9-12nT range with a peak of over 14.5nT around 7:20UT. The magnetic field Bz component was variable with excursions down to -9nT. Solar wind speed is expected to further increase and remain elevated over the next few days under influence of the coronal hole high speed stream. Geomagnetic conditions were quiet to unsettled (local K Dourbes 0-2 and NOAA Kp 0-3). Geomagnetic conditions are expected to be unsettled to active with minor geomagnetic storms possible under the influence of the high speed stream.

Today's estimated international sunspot number (ISN): 026, based on 07 stations.

Solar indices for 23 Dec 2017

Wolf number Catania///
10cm solar flux076
AK Chambon La Forêt008
AK Wingst005
Estimated Ap004
Estimated international sunspot number027 - Based on 12 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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