Перегляд архіву середа, 8 жовтня 2014

Daily bulletin on solar and geomagnetic activity from the SIDC

Випущено: 2014 Oct 08 1353 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
08 Oct 2014	125	015
09 Oct 2014	124	008
10 Oct 2014	120	006

Bulletin

Solar activity is very low, with only three C-class flare reported during last 24 hours. The strongest flare was the C1.6 flare (peaked at 16:00 UT on October 07) originating from the not yet classified active region at about N15 E25. No Earth-directed CMEs were observed during last 24 hours. We expect solar activity to remain low with occasional C-class flares. ACE solar wind data indicate possible arrival of the sector boundary or ICME (solar origin is not yet understood). The sector change was observed at about 05:30 UT this morning. The Bz component of the interplanetary magnetic field is fluctuating and it had few intervals of negative value (up to - 8 nT). Simultaneously to the longest interval of negative Bz (about 4 hours) the magnitude of the interplanetary magnetic field had reached the value of about 10 nT. Currently the interplanetary magnetic field magnitude is about 4 nT and the solar wind speed is still low with the value of about 350 km/s. Due to negative intervals of Bz component of the interplanetary magnetic field we have currently active geomagnetic conditions (K=4 reported by local station at Dourbes). We expect unsettled to active geomagnetic conditions to continue in the coming hours.

Today's estimated international sunspot number (ISN): 059, based on 15 stations.

Solar indices for 07 Oct 2014

Wolf number Catania	104
10cm solar flux	125
AK Chambon La Forêt	007
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	052 - Based on 21 stations

Noticeable events summary

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

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