Viewing archive of Wednesday, 21 January 2015

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2015 Jan 21 1243 UTC

SIDC Forecast

Solar flares

Active (M-class flares expected, probability >=50%)

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
21 Jan 2015	126	027
22 Jan 2015	128	007
23 Jan 2015	130	007

Bulletin

Solar activity has been marked by C-class flares from an active region rotating into view from the east limb. It produced a C9.9 flare peaking at 11:42 UT. M-class flares from this region are likely. Geomagnetic conditions have been quiet. A relatively fast solar wind stream has arrived to ACE this morning, with strong magnetic fields reaching 20 nT. So far containing only northward directed fields (positive Bz). If Bz turns south, then active to minor storm levels can be expected.

Today's estimated international sunspot number (ISN): 031, based on 05 stations.

Solar indices for 20 Jan 2015

Wolf number Catania	///
10cm solar flux	126
AK Chambon La Forêt	006
AK Wingst	002
Estimated Ap	003
Estimated international sunspot number	047 - Based on 14 stations

Noticeable events summary

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

All times in UTC

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