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Daily bulletin on solar and geomagnetic activity from the SIDC

Vydáno: 2019 Jul 21 1230 UTC

SIDC Forecast

Sluneční erupce

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

Geomagnetism

Quiet (A<20 and K<4)

Sluneční protony

Quiet

	10cm flux	Ap
21 Jul 2019	067	005
22 Jul 2019	068	003
23 Jul 2019	068	009

Bulletin

Solar activity was at very low levels. The Sun remains spotless and no flares have been observed. 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. Solar activity is expected to remain at very low levels.

The solar wind speed varied between 315 and 370 km/s (ACE). The Bz varied between -4 and +3 nT. The interplanetary magnetic field was predominantly directed away from the Sun (positive sector). Quiet to unsettled geomagnetic conditions were observed, with the Kp index (NOAA) ranging between 1-2 and the local K index (Dourbes) ranging between 0-3 over the past 24 hours.

Quiet geomagnetic conditions are expected to continue for July 21 and 22 with unsettled conditions on July 23 due to the influence of the solar wind stream originating from the extension of the southern polar coronal hole, which traversed the central meridian on July 19.

Today's estimated international sunspot number (ISN): 000, based on 21 stations.

Solar indices for 20 Jul 2019

Wolf number Catania	///
10cm solar flux	067
AK Chambon La Forêt	006
AK Wingst	003
Estimated Ap	003
Estimated international sunspot number	000 - Based on 21 stations

Noticeable events summary

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

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