Viewing archive of Friday, 9 February 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Feb 09 1617 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
09 Feb 2018	078	003
10 Feb 2018	079	004
11 Feb 2018	080	007

Bulletin

Solar activity was low. NOAA AR 2699 produced many B-class flares, the biggest flare B7.4 peaked yestreday at 16:59 UT. Now NOAA 2699 has beta-gamma magnetic field configuration and is expected to produce C-class flares and, with some small chance, M-class flares. Proton flux levels are at background values and are expected to remain so. No Earth-directed CMEs were observed. Solar wind speed decreased from 400 km/s till at 325 km/s with interplanetary magnetic field magnitude ranged from 4 to 5.5 nT. Geomagnetic conditions reached unsettled levels (K = 3) this morning due to the longer interval of the negative Bz value (-4.5 nT) and speeds reaching only 370 km/s. Quiet geomagnetic conditions can be expected in the next 48hrs.

Today's estimated international sunspot number (ISN): 026, based on 17 stations.

Solar indices for 08 Feb 2018

Wolf number Catania	023
10cm solar flux	078
AK Chambon La Forêt	010
AK Wingst	004
Estimated Ap	003
Estimated international sunspot number	025 - Based on 23 stations

Noticeable events summary

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

All times in UTC

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