Viewing archive of Wednesday, 21 August 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Aug 21 1244 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
21 Aug 2019	067	006
22 Aug 2019	067	007
23 Aug 2019	067	007

Bulletin

The solar activity has been quiet over the past 24 hours. The sun is currently spotless and the X-ray flux remained below B-level. Solar activity is expected to remain at low levels for the next 24 hours.

No Earth-directed coronal mass ejections (CME) were observed over the last 24 hours in the available coronagraph imagery. The greater than 10 MeV proton flux remained at background levels over the past 24 hours and is expected to remain at low levels.

The wind speed first reached about 430 km/s and then slowly decreased to about 380 km/s, the total interplanetary magnetic field remained below 5 nT, and the Bz component varied between -4 nT and +4 nT (as recorded by ACE). The solar wind parameters may show some minor enhancement for next period due to the possible effect of a southern coronal hole of negative polarity that was facing Earth on August 18.

Quiet geomagnetic conditions were observed. Quiet conditions are expected for the next period, with small chances of short periods of unsettled conditions.

Today's estimated international sunspot number (ISN): 000, based on 20 stations.

Solar indices for 20 Aug 2019

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	008
AK Wingst	006
Estimated Ap	005
Estimated international sunspot number	000 - Based on 26 stations

Noticeable events summary

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

All times in UTC

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