Viewing archive of Sunday, 12 August 2018

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2018 Aug 12 1230 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

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

Solar protons

Quiet

	10cm flux	Ap
12 Aug 2018	067	011
13 Aug 2018	068	008
14 Aug 2018	069	007

Bulletin

No C-class flares in past 24 h. Solar activity is expected to remain at very low levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.

The solar wind speed is at 400 km/s with interplanetary magnetic fields of 5 nT. Geomagnetic conditions have been quiet except for a period around midnight with active conditions (KDourbes = 4 from 23:00 UT on August 11 until 01:00 today, Kp = 4 in the 3h period starting at 21:00 UT on August 11). The active conditions occurred after several hours of negative Bz (around -7nT), after a sector boundary crossing. The fast solar wind associated with a small negative polarity equatorial coronal hole may affect the Earth today causing isolated active conditions.

Today's estimated international sunspot number (ISN): 000, based on 18 stations.

Solar indices for 11 Aug 2018

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	021
AK Wingst	017
Estimated Ap	016
Estimated international sunspot number	000 - Based on 28 stations

Noticeable events summary

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

All times in UTC

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