Viewing archive of Tuesday, 13 August 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Aug 13 1231 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
13 Aug 2019	068	007
14 Aug 2019	069	007
15 Aug 2019	068	007

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 remained stable at the values around 450 km/s (ACE). The total interplanetary magnetic field decreased from values near 5 nT to a minimum of 1 nT around 23:30 UT (ACE) before gradually increasing again till 7.3 nT by the end of the period, 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 +4.3 nT.

Quiet geomagnetic conditions were observed. Quiet to unsettled geomagnetic conditions can be 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 12 Aug 2019

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	011
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	000 - 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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