Vaata kolmapäev, 27 september 2017 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2017 Sep 27 1248 UTC

SIDC Forecast

Valid from 1230 UTC, 27 Sep 2017 until 29 Sep 2017
Päikesepursked ehk loited

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

Geomagnetism

Minor storm expected (A>=30 or K=5)

Päikese prootonid

Quiet

10cm fluxAp
27 Sep 2017091029
28 Sep 2017093013
29 Sep 2017091008

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. Catania group 57 (NOAA AR region 2683) has been most active, producing one C1.7 flare peaking at 01:03 UT today. Eruptive activity observed on the visible side of the solar disk yesterday is not geoeffective. No Earth directed Coronal Mass Ejections (CMEs) have been detected today. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with some probability of C-class flares. The sudden jump of the solar wind speed (up to maximum value of 560 km/s) and simultaneous increase of the density and interplanetary magnetic field magnitude (up to 17 nT) observed at around 07 UT on September 27 (today) indicated arrival of the fast flow associated with the low latitude extension of the northern polar coronal hole. The longer intervals of the southward Bz component (up to -17 nT) and fast solar wind induced minor geomagnetic storm conditions starting at about 06:00 UT on September 27 (local station at Dourbes reported K=4 and NOAA reported Kp=5). We expect active to minor storm conditions (till Kp=5) within next 24 hours due to arrival of the fast solar wind. Isolated episodes of Kp=6 are also not excluded.

Today's estimated international sunspot number (ISN): 040, based on 17 stations.

Solar indices for 26 Sep 2017

Wolf number Catania046
10cm solar flux091
AK Chambon La Forêt013
AK Wingst005
Estimated Ap003
Estimated international sunspot number041 - Based on 24 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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