Vaata neljapäev, 30 aprill 2015 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2015 Apr 30 1230 UTC

SIDC Forecast

Valid from 1230 UTC, 30 Apr 2015 until 02 May 2015
Päikesepursked ehk loited

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

Geomagnetism

Active conditions expected (A>=20 or K=4)

Päikese prootonid

Quiet

10cm fluxAp
30 Apr 2015106017
01 May 2015110008
02 May 2015114008

Bulletin

The solar disk currently is almost spotless. One single C1.0 flare occurred at the southwest limb. A faint CME was visible, with first measurement in SOHO/LASCO-C2 at 2:24 UT on April 30, related to backside activity and propagating north. There is some chance (40%) for further C-class flares. Solar wind observations indicate the arrival of a flow related to a positive polarity coronal hole. Around 4:00 UT on April 30, temperature and solar wind speed increased (currently at 370 km/s), while the magnitude of the Interplanetary Magnetic Field (IMF) became more variable and increased to 12 nT. The south component of the IMF is fluctuating between -6 and +8nT. Quiet to unsettled (local K=0 to 3 at Dourbes) geomagnetic conditions were observed. Mainly quiet geomagnetic conditions are expected, with some chance for a few time slots of active (K=4) to minor storm (K=5) conditions within the next 24 hours. Another flow emanating from the extension of a negative polarity northern coronal hole could arrive on May 2.

Today's estimated international sunspot number (ISN): 011, based on 23 stations.

Solar indices for 29 Apr 2015

Wolf number Catania036
10cm solar flux104
AK Chambon La Forêt011
AK Wingst004
Estimated Ap003
Estimated international sunspot number020 - Based on 26 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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