Vaata esmaspäev, 12 august 2013 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2013 Aug 12 1221 UTC

SIDC Forecast

Valid from 1230 UTC, 12 Aug 2013 until 14 Aug 2013
Päikesepursked ehk loited

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
12 Aug 2013114008
13 Aug 2013118007
14 Aug 2013120007

Bulletin

NOAA AR 1817 is expected to be the main player in the coming 48 hours with risks of M class flares. It evolved rather quickly in the past 24 hours, and it is now a complex and elongated sunspot group. The central part shows a wide penumbra making the link between two opposite polarity sunspots. Strong C flares occurred in this region on August 11 (C6.7 at 2131UT and C8.4 at 2158 UT peak time). A M1.5 flare occurred in this region on August 12, 1041 UT peak time. Indirect signatures of CMEs were observed, on disk, with EUV imagers, but data gaps in coronagraphic data during these flares, do not allow to confirm this. We expect active flaring conditions in the next 48 hours. C flares are possible for NOAA AR 1818. We foresee mostly quiet conditions in terms of geomagnetic activity for the next 48 hours. Current interplanetary conditions, as measured by ACE are quiet.

Today's estimated international sunspot number (ISN): 057, based on 13 stations.

Solar indices for 11 Aug 2013

Wolf number Catania///
10cm solar flux110
AK Chambon La Forêt///
AK Wingst006
Estimated Ap006
Estimated international sunspot number054 - Based on 20 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
12102110411047----M1.5--/1817

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

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