Vaata pühapäev, 12 mai 2013 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2013 May 12 1221 UTC

SIDC Forecast

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

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

Geomagnetism

Quiet (A<20 and K<4)

Päikese prootonid

Quiet

10cm fluxAp
12 May 2013142011
13 May 2013142010
14 May 2013139007

Bulletin

Solar activity has been eruptive during the past 24 hours, featuring eighteen C flares. The largest flare was released by NOAA AR 11746 and reached a C8.0 peak around 19:48 UT on May 11. More C flares and even M flares are likely within the next 48 hours, especially from NOAA AR 11744, 11745, and 11746. A large filament eruption took place near 40W 35N around 21:45 UT on May 11. An associated CME was registered by LASCO C2, STEREO COR2 A and B. A glancing blow from this CME is possible, with an expected arrival time at Earth in the first half of May 15. In the last 24 hours, the IMF has varied between 2.5 and 3.5 nT, while solar wind speeds have decreased from about 400 and to 360 km/s. In the second half of May 12, a weak coronal hole high speed stream may cause solar wind speeds to increase again up to 500 km/s. Geomagnetic activity has been at quiet levels (K Dourbes between 0 and 3; NOAA Kp between 1 and 2) during the past 24 hours. Quiet geomagnetic conditions (K Dourbes < 4) are expected for May 12 to 14, with a chance for active levels (K Dourbes = 4) in the second half of May 12, due to a weak coronal hole high speed stream.

Today's estimated international sunspot number (ISN): 094, based on 06 stations.

Solar indices for 11 May 2013

Wolf number Catania///
10cm solar flux137
AK Chambon La Forêt007
AK Wingst004
Estimated Ap003
Estimated international sunspot number089 - Based on 17 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmRadio burst typesCatania/NOAA
Puuduvad

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

Kõik ajad UTC-s

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