Viewing archive of Thursday, 18 July 2019

Daily bulletin on solar and geomagnetic activity from the SIDC

Issued: 2019 Jul 18 1230 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
18 Jul 2019	068	005
19 Jul 2019	068	005
20 Jul 2019	067	005

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 gradually decreased over the period from 460 to around 360 km/s (ACE). The Bz varied between -3 and +2 nT. During the first half of the period the interplanetary magnetic field was predominantly directed away from the Sun (positive sector) but switched to be mostly in the negative sector from 00:00 UT July 18 . Quiet to unsettled geomagnetic conditions were observed, with the Kp index (NOAA) ranging between 0-2 and the local K index (Dourbes) ranging between 0-3 over the past 24 hours.

Quiet geomagnetic conditions are expected with possible isolated unsettled intervals.

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

Solar indices for 17 Jul 2019

Wolf number Catania	000
10cm solar flux	068
AK Chambon La Forêt	009
AK Wingst	007
Estimated Ap	006
Estimated international sunspot number	000 - Based on 26 stations

Noticeable events summary

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

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