Просмотр архива за воскресенье, 24 марта 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Существующий: 2013 Mar 24 1200 UTC

SIDC Forecast

Солнечные вспышки

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

Geomagnetism

Quiet (A<20 and K<4)

Солнечные протоны

Quiet

	10cm flux	Ap
24 Mar 2013	098	003
25 Mar 2013	098	001
26 Mar 2013	100	001

Bulletin

Solar activity has been very low during the past 24 hours. A backsided CME propagating to the south was observed in STEREO A and B and LASCO from 12h UT on 23 March. STEREO A/B EUV 195 images showed the eruption to originate from NOAA AR1689. No Earth-directed component is expected. A small low-latitude coronal hole is approaching the central meridian. We expect arrival of the associated fast flow on 28 March. At 19h UT on 23 March, solar wind speed increased to 450 km/s and the magnitude of the interplanetary magnetic field increased to 10 nT. The K-index in Dourbes and Izmiran went to K=4. This was possibly related to the arrival of the CME of 19 March. Geomagnetic conditions are quiet again and expected to remain so for the next 48 hours.

Today's estimated international sunspot number (ISN): 029, based on 02 stations.

Solar indices for 23 Mar 2013

Wolf number Catania	///
10cm solar flux	098
AK Chambon La Forêt	023
AK Wingst	012
Estimated Ap	013
Estimated international sunspot number	034 - Based on 13 stations

Noticeable events summary

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

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