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Daily bulletin on solar and geomagnetic activity from the SIDC

Datum verslag: 2018 Feb 17 1256 UTC

SIDC Forecast

Zonnevlammen

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

Geomagnetism

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

Proton Flux monitor

Quiet

	10cm flux	Ap
17 Feb 2018	072	019
18 Feb 2018	071	010
19 Feb 2018	070	007

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. Active Region (AR) 2699 (Mcintosh class:Hax; Mag. type:Alpha) has reached the west limb. The greater than 10MeV proton flux remained at background levels over the past 24 hours. No Earth directed Coronal Mass Ejections (CMEs) have been detected. Over the next 24 hours there is a small chance of C-class flares. The solar wind speed has increased from around 350 to 500 km/s over the past 24 hours. The total magnetic field strength has slowly decreased from around 10 to 5 nT, the Bz component has fluctuated between -6 and +6 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. A High Speed Stream (HSS) associated with a large coronal hole that passed the central meridian a couple of days ago has enhanced solar wind speeds at Earth. Geomagnetic conditions are expected to be quiet to unsettled.

Today's estimated international sunspot number (ISN): 000, based on 15 stations.

Solar indices for 16 Feb 2018

Wolf number Catania	016
10cm solar flux	072
AK Chambon La Forêt	015
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	014 - Based on 28 stations

Noticeable events summary

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

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