Перегляд архіву середа, 29 травня 2013

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2013 May 29 1136 UTC

SIDC Forecast

Сонячні спалахи

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

Geomagnetism

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

Сонячні протони

Quiet

	10cm flux	Ap
29 May 2013	105	001
30 May 2013	105	006
31 May 2013	105	032

Bulletin

Solar activity was low during the past 24 hours, with only two C1-class flares. The last one was a two-ribbon flare and occurred at 7h30 UT near active region Catania 83 (NOAA 1755), but currently no associated CME is detected. C-class flaring conditions are expected for the next 48 hours. The solar wind speed decreased during the past 24 hours from 800 to 550 km/s. The interplanetary magnetic field is stable with a magnitude of less than 5 nT and a positive Bz-component. Geomagnetic conditions are quiet (local K<3 at Dourbes) and are expected to remain so for the next 24 hours. At the end of day 2 we expect the arrival of a fast solar wind stream emanating from a coronal hole in the central of the solar disk, possibly resulting in geomagnetically active to minor storm levels (K= 4 to 5).

Today's estimated international sunspot number (ISN): 050, based on 06 stations.

Solar indices for 28 May 2013

Wolf number Catania	///
10cm solar flux	105
AK Chambon La Forêt	008
AK Wingst	010
Estimated Ap	010
Estimated international sunspot number	055 - Based on 25 stations

Noticeable events summary

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

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