Viewing archive of Friday, 22 January 2016

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2016 Jan 22 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
22 Jan 2016	104	018
23 Jan 2016	103	013
24 Jan 2016	106	005

Bulletin

NOAA 2487 produced the only C-class flare of the period, a C1.4 peaking at 13:51UT. The event lasted for 57 minutes (x-ray) and was associated with a relatively narrow coronal mass ejection (CME) that was not directed to Earth. The nearby 20 degrees long north-south oriented filament remained stable. NOAA 2486 was decaying. No earth-directed CMEs were observed.

There remains a chance on an isolated C-class flare. . The earth environment remained under the influence of the high speed stream of the southern polar coronal hole (CH). Solar wind started and ended the period with a speed of around 500 km/s, meanwhile reaching a maximum speed of about 550 km/s early on 22 January (02UT-05UT). Bz undulated between -7 nT and + 6 nT, while the interplanetary magnetic field was directed towards the Sun. Mostly active geomagnetic conditions were recorded, with locally (Dourbes) minor storming during the 22-23UT interval. The extension of a northern polar CH around +25 degrees latitude is transiting the central meridian.

Mostly quiet to unsettled geomagnetic conditions are expected, with a chance on an active episode.

Today's estimated international sunspot number (ISN): 060, based on 11 stations.

Solar indices for 21 Jan 2016

Wolf number Catania	057
10cm solar flux	104
AK Chambon La Forêt	046
AK Wingst	037
Estimated Ap	037
Estimated international sunspot number	058 - Based on 24 stations

Noticeable events summary

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

All times in UTC

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