Viewing archive of Saturday, 12 August 2017

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2017 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 2017	070	013
13 Aug 2017	071	015
14 Aug 2017	070	010

Bulletin

Over the past 24 hours solar activity has been very low. No significant flares have been recorded. Active Region (AR) 2670 (Mcintosh class:Hsx; Mag. type:Alpha) has been quiet. No Earth directed Coronal Mass Ejections (CMEs) have been detected. The greater than 10MeV proton flux remained at background levels over the past 24 hours. Solar activity is expected to remain low over the next 24 hours with a low probability of C-class flares. The solar wind speed has increased from around 400 to 600 km/s over the past 24 hours. The total magnetic field strength has fluctuated around 10 nT. The Bz component fluctuated around 0 nT but was mainly positive, ranging between -10 and +10 nT. Geomagnetic conditions ranged between Kp index 1-3 (NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Several small low latitude coronal holes are currently in the Western hemisphere of the Sun, and there has been a small increase in geomagnetic conditions this morning as we encountered the sector boundary combined with a negative Bz. Geomagnetic conditions are expected to be mainly quiet with some short periods of activity.

Today's estimated international sunspot number (ISN): 011, based on 09 stations.

Solar indices for 11 Aug 2017

Wolf number Catania	///
10cm solar flux	070
AK Chambon La Forêt	017
AK Wingst	009
Estimated Ap	008
Estimated international sunspot number	012 - Based on 29 stations

Noticeable events summary

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

All times in UTC

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