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Daily bulletin on solar and geomagnetic activity from the SIDC

Datum verslag: 2018 Feb 16 1230 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
16 Feb 2018	073	015
17 Feb 2018	072	016
18 Feb 2018	071	010

Bulletin

Over the past 24 hours solar activity has been low. No significant flares have been recorded. Active Region (AR) 2699 (Mcintosh class:Cao; Mag. type:Beta) has been most active, showing considerable flux emergence and cancellation, but is now approaching the western 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 fluctuated around 375 km/s over the past 24 hours. The total magnetic field strength has increased from around 5 nT to 15 nT, the Bz component has fluctuated between -5 and +15 nT. Geomagnetic conditions ranged between Kp index 1-4 (NOAA) and local K index 1-4 (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 may enhance solar wind conditions over the next couple of days. Geomagnetic conditions are expected to be quiet to unsettled.

Today's estimated international sunspot number (ISN): 013, based on 19 stations.

Solar indices for 15 Feb 2018

Wolf number Catania	///
10cm solar flux	073
AK Chambon La Forêt	026
AK Wingst	020
Estimated Ap	018
Estimated international sunspot number	017 - Based on 22 stations

Noticeable events summary

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

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