Viewing archive of Sunday, 11 February 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Feb 11 1303 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
11 Feb 2018	078	002
12 Feb 2018	079	003
13 Feb 2018	078	005

Bulletin

Solar activity slightly increased during the period. NOAA 2699 active region, in spite of decaying magnetic configuration, produced multiple B-class flares and one C4.6 flare peaking at 13:21 UT yesterday. Proton flux levels are at background values and are expected to remain so. No Earth-directed CMEs were observed. C-class flares (and with a tiny chance M-class flares) are still expected. Solar wind speed is currently at 315 km/s with interplanetary magnetic field magnitude of 2.5 nT. Geomagnetic conditions have been very quiet. The fast speed solar wind coming from the transient low latitude negative polarity coronal hole will affect the Earth environment in 4-5 days from now. Mostly quiet geomagnetic conditions are expected in the next 3 days. Isolated episodes of unsettled conditions are not excluded due to occasional passages of transient features.

Today's estimated international sunspot number (ISN): 030, based on 12 stations.

Solar indices for 10 Feb 2018

Wolf number Catania	///
10cm solar flux	078
AK Chambon La Forêt	009
AK Wingst	008
Estimated Ap	006
Estimated international sunspot number	027 - Based on 13 stations

Noticeable events summary

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

All times in UTC

<< Go to daily overview page