Vaata laupäev, 21 veebruar 2015 arhiivi

Daily bulletin on solar and geomagnetic activity from the SIDC

Välja antud: 2015 Feb 21 1225 UTC

SIDC Forecast

Valid from 1230 UTC, 21 Feb 2015 until 23 Feb 2015
Päikesepursked ehk loited

Eruptive (C-class flares expected, probability >=50%)

Geomagnetism

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

Päikese prootonid

Quiet

10cm fluxAp
21 Feb 2015120007
22 Feb 2015125017
23 Feb 2015125009

Bulletin

Solar activity was low with four C-class flares, mainly originating from NOAA active region (AR) 2286, which has currently rounded the west limb. The strongest flare was a C2.3 flare peaking at 15:22 UT on February 20. No associated solar event was observed. A filament eruption was observed starting on February 20 at 3:24 UT near S15E15, with a CME observed in LASCO/C2 (first clear measurement near 7:36 UT ) and in LASCO/C3 (first measurement near 12:06 UT). The very slow CME (nearly 200 km/s) was directed to the south with a less than 100 degrees angular width. No Earth-directed component is expected. Flaring at C-class flares is expected. Nominal solar wind conditions were observed, with the magnitude of the interplanetary magnetic field maximally at 7 nT. The solar wind speed is currently around 350 km/s. Geomagnetic conditions were quiet to unsettled (K=1 to 3) at the local level (Dourbes) and global level (estimated NOAA Kp), which is expected to continue for the next few hours. The arrival of the anticipated coronal hole high speed stream could result in active geomagnetic conditions on February 22 (K=4, with a small chance for K=5).

Today's estimated international sunspot number (ISN): 043, based on 10 stations.

Solar indices for 20 Feb 2015

Wolf number Catania054
10cm solar flux120
AK Chambon La Forêt011
AK Wingst006
Estimated Ap005
Estimated international sunspot number046 - Based on 12 stations

Noticeable events summary

DayBeginMaxLõppLocStrengthOP10cmCatania/NOAARadio burst types
Puuduvad

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

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