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Daily bulletin on solar and geomagnetic activity from the SIDC

Emesso: 2018 Aug 16 1230 UTC

SIDC Forecast

Brillamenti solari

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

Geomagnetism

Quiet (A<20 and K<4)

Protoni solari

Quiet

	10cm flux	Ap
16 Aug 2018	069	013
17 Aug 2018	069	012
18 Aug 2018	069	007

Bulletin

The solar activity has been quiet over the past 24 hours. The sunspot group (NOAA 2718) remained stable and no significant flare has been recorded. Quiet flaring conditions are expected for the next 24-hour period.

No Earth directed Coronal Mass Ejection has been observed. The solar protons flux remained at nominal levels over the past 24 hours and is expected to remain so.

Over the past 24 hours, the solar wind measurements continued to be enhanced with the solar wind associated to the Coronal Hole (which has crossed the central meridian on August 11). The wind speed increased from 450 km/s to about 500 km/s; The interplanetary magnetic field strength fluctuated between 3 and 13 nT; The Southward magnetic component fluctuated between -8 and 10 nT. The enhanced solar wind conditions are expected to persist for the next 24 hours and start to decline on August 18.

Due to the enhanced solar wind conditions, the geomagnetic conditions was unsettled to active (K-Dourbes and Kp were ranging between 2 and 4). Unsettled conditions is expected until while the Earth remains under the influence of the solar wind associated to the coronal hole. Active conditions are likely especially if the southward magnetic component remains negative for longue periods.

Today's estimated international sunspot number (ISN): 013, based on 18 stations.

Solar indices for 15 Aug 2018

Wolf number Catania	///
10cm solar flux	069
AK Chambon La Forêt	030
AK Wingst	020
Estimated Ap	020
Estimated international sunspot number	013 - Based on 19 stations

Noticeable events summary

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

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