Vaata reede, 11 mai 2018 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2018 May 11 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 11 May 2018 until 13 May 2018
Päikesepursked ehk loited

Quiet conditions (<50% probability of C-class flares)

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
11 May 2018070009
12 May 2018070003
13 May 2018069003

Bulletin

Solar activity was at very low levels. Small and inactive region NOAA 2709 (Catania 81) remained the only visible sunspot region on the solar disk. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10 MeV proton flux was at nominal levels.

Solar activity is expected to remain at very low levels.

Earth remained under the influence of the high speed stream (HSS) from an elongated negative polarity equatorial coronal hole (CH). Solar wind speed decreased from about 570 km/s to values near 460 km/s by the end of the period (DSCOVR). Bz varied between -5 and +2 nT, with a negative stretch during the 03-09UT interval and Bz dipping to -5.5 nT. The interplanetary magnetic field was mostly directed towards the Sun. Geomagnetic activity ranged from quiet to active levels.

Quiet to unsettled geomagnetic conditions are expected in response to Earth's gradual exit from the CH HSS. There remains a small chance on an isolated active interval.

Today's estimated international sunspot number (ISN): 011, based on 21 stations.

Solar indices for 10 May 2018

Wolf number Catania011
10cm solar flux070
AK Chambon La Forêt018
AK Wingst014
Estimated Ap014
Estimated international sunspot number012 - Based on 29 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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