Vaata teisipäev, 23 juuni 2015 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2015 Jun 23 1243 UTC

SIDC Forecast

Valid from 1230 UTC, 23 Jun 2015 until 25 Jun 2015
Päikesepursked ehk loited

M-class flares expected (probability >=50%)

Geomagnetism

Major magstorm expected (A>=50 or K>=6)

Päikese prootonid

Proton event in progress (>10 MeV)

10cm fluxAp
23 Jun 2015135038
24 Jun 2015130038
25 Jun 2015125018

Bulletin

NOAA active region 2371 produced an M6.5 flare, peaking at 18:23 UT on June 22. An associated full halo CME erupted, with first measurement in LASCO C2 at 18:36 UT on June 22 and has a projected speed around 1000 km/s . A few filament eruptions were recorded in the Northwest quadrant, first a small one around 22:00 UT and then an extended one starting near 4:24 UT. Coronagraphic data indicate the occurrence of (mainly westward) CMEs, but incomplete data currently prohibit full analysis.

Proton levels have descended from the peak of 1000 pfu, despite some smaller peaks and are around 30 pfu at the moment. NOAA AR 2367 is now close to the West limb and could, in case of further eruptions, elevate the proton levels again. The proton levels might also be enhanced at the expected June 22 CME arrival. Flares at the M-level are expected, with some chance (15%) for a flare at the X-level.

A shock arrived to the ACE spacecraft at 18:01 UT on June 22, marking the expected arrival of the June 21 CME. The interplanetary magnetic field (IMF) magnitude jumped to 42 nT, with long periods of negative Bz down to -39 nT. Solar wind speeds reached values between 600 and 780 km/s. The IMF magnitude has declined to a current value of 12 nT.

Minor to severe geomagnetic conditions were recorded, with severe levels between 18 and 21 UT (on June 22) and between 3 and 6 UT (on June 23). The local K at Dourbes reached K=8 at 22 UT (on June 22). A decline to unsettled levels is expected for the coming hours. Further minor to major storm levels are expected, following the expected arrival of June 22 CME around 12:00 UT on June 24.

Today's estimated international sunspot number (ISN): 042, based on 14 stations.

Solar indices for 22 Jun 2015

Wolf number Catania083
10cm solar flux135
AK Chambon La Forêt108
AK Wingst///
Estimated Ap073
Estimated international sunspot number047 - Based on 23 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
22173918231851N12W08M6.52B100092/2371II/1

Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive

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