Viewing archive of Wednesday, 25 January 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 Jan 25 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
25 Jan 2017	084	005
26 Jan 2017	083	005
27 Jan 2017	082	031

Bulletin

Solar activity was very low. NOAA 2629, a new sunspot region near the east limb, developed quickly into a mature group and produced a series of B-class flares. The strongest event was a B5 flare peaking at 17:55UT. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.

Mostly quiet flaring conditions are expected, with a chance on a C-class event in particular from NOAA 2629.

Solar wind speed varied between 310 and 350 km/s (ACE). Bz intensified somewhat and was fluctuating between -6 nT and +6 nT. The interplanetary magnetic field was mostly directed away from the Sun. A small positive equatorial coronal hole (CH) transited the central meridian.

The geomagnetic field was at quiet to unsettled levels and is expected to remain so. The CH's particle stream is expected to arrive at Earth around 27 January and may result in active to minor storming episodes.

Today's estimated international sunspot number (ISN): 046, based on 05 stations.

Solar indices for 24 Jan 2017

Wolf number Catania	053
10cm solar flux	082
AK Chambon La Forêt	008
AK Wingst	003
Estimated Ap	002
Estimated international sunspot number	043 - 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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