Viewing archive of Monday, 12 August 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Aug 12 1233 UTC

SIDC Forecast

Solar flares

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

Geomagnetism

Quiet (A<20 and K<4)

Solar protons

Quiet

	10cm flux	Ap
12 Aug 2019	068	006
13 Aug 2019	067	006
14 Aug 2019	067	004

Bulletin

Solar activity was at very low levels. The Sun was spotless. No Earth-directed coronal mass ejections (CME) were observed during the period. The greater than 10 MeV proton flux was at nominal values.

Solar activity is expected to remain at very low levels.

The solar wind speed decreased from values near 475 km/s to a minimum of 360 km/s around 4 UT (ACE) before gradually increasing again, due to the solar wind stream from the fragmented negative polarity coronal hole which began to traverse the central meridian on 7 August. Bz varied between -4 and +6 nT. The interplanetary magnetic field (phi angle) was predominately oriented away from the Sun (positive sector) until 3 UT when it switched to the negative sector.

Quiet to unsettled geomagnetic conditions were observed. Quiet to unsettled geomagnetic conditions are expected over the next 24 hours due to the ongoing influence of the wind stream associated with the negative polarity coronal hole.

Today's estimated international sunspot number (ISN): 000, based on 22 stations.

Solar indices for 11 Aug 2019

Wolf number Catania	///
10cm solar flux	068
AK Chambon La Forêt	012
AK Wingst	008
Estimated Ap	007
Estimated international sunspot number	000 - Based on 27 stations

Noticeable events summary

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

All times in UTC

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